This file was created by the TYPO3 extension publications --- Timezone: CEST Creation date: 2026-05-13 Creation time: 22:32:31 --- Number of references 31 article Parisi2025 Article 2025 10.1016/j.quascirev.2025.109489 Quaternary Science Reviews 366 https://www.scopus.com/inward/record.uri?eid=2-s2.0-105008914705&doi=10.1016%2fj.quascirev.2025.109489&partnerID=40&md5=d265b516dadc5251c4c0e9e2cb0ad755 Cited by: 0; All Open Access, Hybrid Gold Open Access Roberta Parisi Thomas M. Cronin Nataliya Tur Michael Toomey Ilaria Mazzini article Parisi2024 Article 2024 10.1016/j.palaeo.2024.112483 Palaeogeography, Palaeoclimatology, Palaeoecology 655 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85203411862&doi=10.1016%2fj.palaeo.2024.112483&partnerID=40&md5=94cd534929b784cf363580b29a4da45b Cited by: 1; All Open Access, Hybrid Gold Open Access R. Parisi T.M. Cronin G. Aiello D. Barra D.L. Danielopol D.J. Horne I. Mazzini article Mesimeri2022334 On 2020 December 23, a seismic crisis initiated in the western Corinth Gulf offshore Marathias, lasted several months, and generated thousands of small magnitude earthquakes. The Gulf of Corinth is well known for earthquake swarm occurrence and short-lived burst-like earthquake sequences, mostly triggered by crustal fluids. Here, we perform a detailed seismic analysis aiming to identifying earthquake clusters within the seismic crisis and define their spatial and temporal characteristics. Thanks to the dense seismic station coverage in the area, operated by the Hellenic Unified Seismological Network and Corinth Rift Laboratory, we relocate shallow seismicity and compile a high-resolution earthquake catalogue containing ∼1400 earthquakes spanning the first two months of the seismic crisis. We identify 19 earthquake clusters by applying spatio-temporal criteria and define the geometry (strike and dip) using principal component analysis for 11 of them. Our results are consistent with moment tensor solutions computed for the largest earthquake in each cluster. A striking feature of the seismic activity is the west-towards-east migration with a notable increase in Vp/Vs values for each cluster and a slight increase of the dip angle for the identified fault segments. Furthermore, we find that each cluster contains several burst-like, short interevent time, repeating earthquakes, which could be related to aseismic slip or fluid migration. Overall, we show that the 2020-2021 seismic crisis consists of earthquake clusters that bifurcate between swarm-like and main shock-aftershock-like sequences and ruptured both north- and south-dipping high-angle fault segments. The 2020-2021 seismic activity is located between 5 to 8 km, shallower than the low angle north-dipping (∼10°) seismic zone which hosts long-lived repeating sequences at ∼9-10 km depth. This study supports a hypothesis that the low-angle north-dipping seismicity defines the brittle-ductile transition in the western Corinth Gulf, with seismic bursts occurring at shallower depths in the crust. © 2022 The Author(s) 2022. Published by Oxford University Press on behalf of The Royal Astronomical Society. Article 2022 English 0956540X 10.1093/gji/ggac081 Geophysical Journal International 230 Oxford University Press 334 – 348 1 Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Faulting; Offshore oil well production; Principal component analysis; Continental tectonics: Extensional; Fault strain; Fracture strain; Fracture, fault, and high strain deformation zone; High strain deformation zones; Multi-segment; Offshores; Seismic activity; Seismicity and tectonics; Small-magnitude earthquakes; deformation; extensional tectonics; fault; fracture zone; P-wave; rupture; S-wave; seismicity; strain analysis; Earthquakes https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127866988&doi=10.1093%2fgji%2fggac081&partnerID=40&md5=f4ddf4ee04e0e3fc8e96219000f90298 Cited by: 5 Maria Mesimeri Athanassios Ganas Kristine L Pankow article Duverger2018196 We analyse the complete earthquake archive of the western Corinth Rift using both crosscorrelations between pairs of event waveforms and accurate differential traveltimes observed at common stations, in order to identify small-scale fault structures at depth. The waveform database was generated by the dense Corinth Rift Laboratory network and includes about 205 000 events between 2000 and 2015. Half of them are accurately relocated using doubledifference techniques. The novelty of this relocated catalogue is the integration of the recent westernmost earthquakes due to the extension of the network in 2010 to the western extremity of the Corinth Rift and the consideration of the whole database over more than 15 yr. The total relocated seismicity exhibits well-defined clusters at the root of the main normal faults mainly between 5 and 10 km depth in the middle of the gulf and illuminates thin active structure planes dipping north about 20° under the northern coast. Some seismicity is observed in the footwall of the main active faults, along theWest and East Helike faults.We also built a multiplet database based on waveform similarity taking into account cross-correlation coefficients weighted by signal-to-noise ratios. Short-termmultiplets are concentrated in the middle of the gulf along the Kamarai fault system, in a 1-2 km thick layer at 6-8 km depth, interpreted as a highly fractured geological layer. They are often associated to slow seismic migration velocities occurring in this zone during strong swarm episodes and are thus likely to be triggered by pore pressure variations. On the other hand, most long-term and regular multiplets are located deeper (7- 10 km), under the northern coast, within a layer less than 0.3 km thick. They occur at the border of nearly planar structures with low seismicity rate, which we identify as fault planes, and they may be explained by aseismic slip on the fault surface around them. This supports the existence of an immature structure growing downdip towards the north at the base of the active geological layer, which possibly connects to the ductile middle crust around 15 km depth, as suggested by the occurrence of deeper events in the continuity of the 1995-fault plane. The different migration velocities (from 0.05 km d-1 to several km d-1) highlighted during the western 2014-swarms indicate that both pore pressure and creep diffusion are operating in the fault zone. The fast migrations observed in the Psathopyrgos fault zone, where a slow slip event was detected by dilatometers in 2002, compare with that for creeping faults. To the west, from spatial distribution of events, we show that the Rion-Patras fault connecting the western extremity of the Corinth Rift fault system to the Patras Rift, is dipping around 60° north-west with a rake angle of -115°. Finally, we identified two new areas within the central active zone which may correspond to large scale, locked asperities on active fault surfaces, similar in size to the main asperity broken during the 1995, MW 6.3, Aigion earthquake. © The Author(s) 2018. Article 2018 English 0956540X 10.1093/gji/ggy264 Geophysical Journal International 215 Oxford University Press 196 – 221 1 Corinth Rift; Greece; Ionian Sea; Mediterranean Sea; Database systems; Earthquakes; Pore pressure; Signal to noise ratio; Cross-correlation coefficient; Double-difference technique; Earthquake dynamics; Europe; Pressure variations; Seismicity and tectonics; Transient deformation; Waveform similarity; deformation; earthquake mechanism; normal fault; rift zone; seismic migration; seismicity; signal-to-noise ratio; tectonics; wave velocity; waveform analysis; Fault slips https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056608760&doi=10.1093%2fgji%2fggy264&partnerID=40&md5=b620fbbb8069d1e40729140e1cb93422 Cited by: 30; All Open Access, Green Open Access C. Duverger S. Lambotte P. Bernard H. Lyon-Caen A. Deschamps A. Nercessian article Giannopoulos2017284 Three years of continuous waveform data recorded at 22 stations from the Corinth Rift Laboratory and the Hellenic Unified Seismological Network are used to perform an ambient noise surface wave tomography of the western Corinth Rift. All available vertical component time-serieswere cross-correlated to extract empirical Rayleigh-wave Green's functions. Group velocity dispersion curves were measured for each station-pair by applying frequency-time analysis and then inverted to build 2-D group velocity maps between 1 and 6 s period. Finally, we locally inverted these velocity maps using a neighbourhood algorithm to assess the 3-D shear-velocity model of the shallow crustal structure of the western Corinth Rift. Across all studied periods the southern coast of the Corinth Gulf is generally imaged as a region of lower velocities compared to the northern coast. At periods up to 3 s, the spatial variation of the group velocities is correlated with the surface geology of the area. Lower velocities are observed in areas where mostly Plio-Quaternary syn-rift sediments are present, such as offshore regions of the rift, the Mornos delta and the largest part of the southern coast. Higher velocities are observed in pre-rift basement structures which are dominated mostly by carbonates. At periods above 3 s, where Rayleigh-waves begin to sense deeper structures below the sediments within the underlying basement, our study highlights the presence of a distinct zone of lower velocities across the southern part of the rift with an elongation in the WNW-ESE direction. The interpretation of this low velocity includes two arguments, the present-day active tectonic regime and the possible involvement of fluids circulation processes at depth within a highly fractured upper crust in the vicinity of the major faults zones. In general, the results demonstrate good agreement with the major geological and tectonic features of the area, as well as with previous local earthquake tomography studies and support the assumption of fluid circulations at depth. This work intends to be the base for further investigations towards the study of the Corinth Rift structure using long-time series of ambient noise data. © The Authors 2017. Article 2017 English 0956540X 10.1093/GJI/GGX298 Geophysical Journal International 211 Oxford University Press 284 – 299 1 Corinth Rift; Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Acoustic noise; Buildings; Coastal engineering; Group velocity dispersion; Interferometry; Light velocity; Rayleigh waves; Seismology; Surface waves; Tectonics; Three dimensional computer graphics; Ambient noise tomographies; Continuous waveforms; Crustal structure; Group velocity dispersion curve; Neighbourhood algorithms; Seismic tomography; Shear velocity models; Surface-wave tomography; algorithm; ambient noise; crustal structure; Green function; Rayleigh wave; seismic velocity; seismology; tomography; Shear flow https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032625182&doi=10.1093%2fGJI%2fGGX298&partnerID=40&md5=27343f9953364f611744591dec22585d Cited by: 6; All Open Access, Green Open Access Dimitrios Giannopoulos Diane Rivet Efthimios Sokos Anne Deschamps Aurelien Mordret Hélène Lyon-Caen Pascal Bernard Paraskevas Paraskevopoulos G-Akis Tselentis article Albini20171663 The area of the western Gulf of Corinth around the city of Aigio (Achaea, northwest Peloponnese, Greece) represents an international pilot site for continuous monitoring and multidisciplinary research on earthquake processes. In the framework of the ANR-SISCOR Corinth Rift Laboratory project (2011–2014), a thorough reappraisal of the five largest (Mw >6) eighteenth–nineteenth century earthquakes was performed, namely those of 14 May 1748, 23 August 1817, 26 December 1861, 9 September 1888, and 25 August 1889. Written observations of earthquake effects were looked into in their original version and language and were placed in the context from which they originated, to avoid the translations and digests on which previous seismological studies had relied. Earthquake records were traced for 108 different localities, and 143 macroseismic intensities in European Macroseismic Scale 1998 (EMS-98) have been assigned. Earthquake-related geological phenomena have been identified and carefully mapped, to be used as a further constraint of the location and magnitude of the associated earthquakes. Finally, new parameters for the studied earthquakes have been assessed with two separate and independent strategies to quantify epistemic uncertainties. In conclusion, the 1748, 1817, and 1888 earthquakes were located in the area of Aigio; the 1861 earthquake is reckoned to be the largest in the area, with an epicentral location at sea; whereas the 1889 earthquake has been relocated to the northwest in mainland Greece, well outside the Gulf of Corinth. © 2017, Seismological Society of America. All rights reserved. Article 2017 English 00371106 10.1785/0120160181 Bulletin of the Seismological Society of America 107 Seismological Society of America 1663 – 1687 4 Achaea; Egion; Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Western Greece; Achaea; Geophysics; Location; Uncertainty analysis; Continuous monitoring; Earthquake process; Earthquake records; Epistemic uncertainties; Laboratory project; Macroseismic intensity; Multi-disciplinary research; New parameters; earthquake epicenter; earthquake event; earthquake magnitude; earthquake mechanism; eighteenth century; nineteenth century; paleoseismicity; seismicity; seismology; structural geology; Earthquakes https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030184822&doi=10.1785%2f0120160181&partnerID=40&md5=23f8e67332484245cc617e5dd1be6979 Cited by: 11; All Open Access, Green Open Access Paola Albini Andrea Rovida Oona Scotti Hélène Lyon-Caen article Janssen201662 We have examined microstructures, mineralogical composition, geochemical alteration, and texture of four selected fault rock samples from the Deep Geodynamical Laboratory (DGLab) Gulf of Corinth project using optical microscopy, cathodoluminescence microscopy (CL), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and synchrotron X-ray diffraction measurements. The fault core is composed of red and gray clayey gouge material and surrounded by a damage zone of brecciated limestones. Pressure solution features, calcite veins and calcite clasts in the breccia and gouge material attest the presence of paleo-fluids and fluid-driven mass transfer during deformation. Differences in CL-colors between the matrix and calcite vein cement and inside the vein cement suggest repeated infiltration of fluids with different composition from various sources (formation water and meteoric water). Twin lamellae densities estimated in calcite veins are used as paleo-piezometer. The deduced differential stress is ~140 ± 70 MPa for the older vein generation and appears to be higher than stress for the youngest veins (45 ± 23 MPa). In spite of the relatively small clay content in both samples, newly formed clay minerals have been observed in gray as well as red clayey gouge material. Differences between gray and red clay gouge material are found in fault rock composition, porosity and clay fabric. The proportion of chlorite in the red gouge is significantly less than that in the gray gouge whereas the initial porosity is significantly higher than in the gray gouge material. The detection of a well-oriented clay fabric in red clay gouge samples is unique in comparison to other major fault zones. © 2016 Elsevier Ltd. Article 2016 English 01918141 10.1016/j.jsg.2016.03.008 Journal of Structural Geology 86 Elsevier Ltd 62 – 74 Gulf of Corinth; Ionian Sea; Mediterranean Sea; Calcite; Cements; Electron microscopy; High resolution transmission electron microscopy; Mass transfer; Microstructure; Porosity; Rocks; Scanning electron microscopy; Stainless steel; Transmission electron microscopy; X ray diffraction; Clay fabrics; Dissolution precipitations; EBSD; Fault rock; Fluid-rock interaction; Gulf of Corinth; Microstructure analysis; core analysis; deformation mechanism; dissolution; fault slip; fault zone; faulting; microstructure; precipitation (chemistry); stress field; water-rock interaction; Structural geology https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962521294&doi=10.1016%2fj.jsg.2016.03.008&partnerID=40&md5=3b0cb26d3af92c6b050e8d3dfd62eb94 Cited by: 9; All Open Access, Bronze Open Access C. Janssen H.-R. Wenk R. Wirth L. Morales H. Kemnitz J. Sulem G. Dresen article Bell2011463 The young (<5Ma) Corinth Rift is an ideal natural laboratory to investigate rift deformation mechanisms by comparing extension rates determined by various methods spanning different depth and time ranges. Corinth Rift geodetic extension rates averaged over 5-100 yr have been interpreted to increase from ~5 mm yr-1 or less in the east to >10-15 mm yr-1 in the west. We quantify total upper-crust and whole-crust extension on three profiles across the Corinth Rift. Whole-crust extension is greater across the central rift (~11-21 km) than across the western part of the rift (~5-13 km). This correlates with the overall rift morphology, which shows maximum basement subsidence, sediment accumulation, rift width and greatest summed Late Quaternary fault displacements in the central basin, but contrasts with the pattern of geodetic extension rates which are greater to the west of the central basin. The E-W increase in strain rates interpreted from geodetic data cannot have persisted over rift history to produce the observed rift morphology. We suggest the discrepancy between short-term and long-term extension patterns is related to shifts in the loci of maximum extension due to fault growth and linkage during Corinth Rift history, and is likely a characteristic of rift development in general. Total upper-crust and whole-crust extension estimates in the western rift, where extension estimates are best constrained, are within error. We propose that uniform pure-shear extension is a viable extension mechanism in the western rift and crustal extension estimates do not require the existence of a major active N-S dipping detachment fault. © 2011 The Authors Geophysical Journal International © 2011 RAS. Article 2011 English 1365246X 10.1111/j.1365-246X.2011.05077.x Geophysical Journal International 186 463 – 470 2 Central Greece; Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Anoxic sediments; Estimation; Geodesy; Morphology; Sedimentology; Tectonics; Central Basin; Continental tectonics; Crustal extension; Deformation mechanism; Detachment fault; Europe; Fault displacement; Fault growth; Geodetic data; Late quaternary; Natural laboratories; Neotectonics; Sediment accumulation; Sedimentary basin; Time range; active fault; deformation mechanism; detachment fault; extensional tectonics; fault displacement; geodesy; geomorphology; neotectonics; rift zone; sedimentary basin; strain rate; subsidence; upper crust; Strain rate https://www.scopus.com/inward/record.uri?eid=2-s2.0-79960356588&doi=10.1111%2fj.1365-246X.2011.05077.x&partnerID=40&md5=f75fbb185805ef603522e55ff90dac2d Cited by: 33; All Open Access, Bronze Open Access, Green Open Access Rebecca E. Bell Lisa C. McNeill Timothy J. Henstock Jonathan M. Bull article Potanina2011610 Based on the data of the detailed earthquake catalog provided on the website of the Corinth Rift Laboratory, zones of swarm activity are revealed and the variations in the statistical parameters of seismic swarms that occurred in the western part of the Gulf of Corinth are calculated. The preliminary analysis of the catalogue is carried out; the magnitude of completeness and the accuracy of the location of the earth-quake are estimated; the changes in these parameters associated with the development of the observational network are assessed. The b-value (b-values) and the cluster dimension of the set of hypocenters are estimated, and time variations in these parameters in the course of the evolution of swarm activity are revealed. The style of changes in the parameters characterizing the seismic regime during intervals of swarm activity indicates that the process of failure exhibits scale redistribution over the course of time, changing from upscaling (progression from smaller to larger scales) at the stage of increasing seismicity to downscaling (progression from larger to lower scales) at the stage of decay. These particular features of enhancement and reduction of swarm seismicity are qualitatively similar to the scenarios of source preparation and aftershock relaxation of strong earthquakes. The pattern of variations of the swarm seismicity studied is similar to those identified in the previous laboratory and field modeling of various transient modes of seismicity. This fact confirms the relevancy of the retrieved results and conclusions based on the laboratory studies of transient modes, and suggests that the latter have a universal governing mechanism. © 2011 Pleiades Publishing, Ltd. Article 2011 English 10693513 10.1134/S106935131106005X Izvestiya, Physics of the Solid Earth 47 610 – 622 7 https://www.scopus.com/inward/record.uri?eid=2-s2.0-79960157329&doi=10.1134%2fS106935131106005X&partnerID=40&md5=597a794c3e017d7da0762373b520cccb Cited by: 6 M.G. Potanina V.B. Smirnov P. Bernard article Janský2009135 We study the efficiency of individual stations of the CRL seismic network in recording the seismic activity in the western Gulf of Corinth, Greece. The stations are located on both the northern and southern coast of the Gulf. The study is based on 5027 earthquakes recorded in 2001, separated into three groups, the southern, central and the northern one. The events were located using the HYPO71PC algorithm. It is shown that the stations significantly differ in their monitoring ability. Article 2009 English 12149705 Acta Geodynamica et Geomaterialia 6 135 – 142 2 https://www.scopus.com/inward/record.uri?eid=2-s2.0-77953777906&partnerID=40&md5=4ab1d78166ac844cf7da18fb2185085a Cited by: 1 Jaromír Janský Jiří Zahradník Vladimír Plicka article Bourouis2009561 The Gulf of Corinth, in western-central Greece, is one of the fastest continental rifts in the world. In its western section near the city of Aigion, the previous work has outlined the existence of a shallow dipping seismogenic zone between 5 and 12 km. This seismic activity has been monitored with a network of 12 three-component stations for the period 2000-2007. Three, few months long, seismic swarms have been observed. They mobilize a complex structural fault system that associates both shallow dipping elements and subvertical structures with very different azimuths, some of which extend to depths greater than that of the shallow dipping zone. The swarm activity associates intensely active, short crises (a few days) with more quiescent periods. The long-term growth velocity of the seismically activated domains is compatible with a fluid diffusion process. Its characteristics are discussed in the context of the results from the 1000 m deep AIG10 well that intersects the Aigion Fault at 760 m. The vertical growth directions of the seismically activated volumes outline two different sources for the fluid and imply non-steady pressure conditions within the seismic domain. The diffusivity along the cataclastic zone of the faults is in the order of 1 m2 s-1, while faults act as hydraulic barrier in the direction perpendicular to their strike. If the vertical direction is a principal stress component, the high pore pressure values that must be reached to induce slip on the shallowly dipping planes can result only from transitory dynamic conditions. It is argued that the shallow dipping active seismic zone is only local and does not correspond to a 100 km scale decollement zone. We propose to associate the localization process with deep fluid fluxes that have progressively modified the local stress field and may be the cause for the quiescence of the West Heliki Fault presently observed. © 2009 The Authors, Journal compilation © 2009 RAS. Article 2009 English 1365246X 10.1111/j.1365-246X.2009.04148.x Geophysical Journal International 178 561 – 580 1 Eurasia; Europe; Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Southern Europe; backarc basin; earthquake swarm; fault zone; fluid-structure interaction; permeability; porosity; rheology; seismicity; stress field https://www.scopus.com/inward/record.uri?eid=2-s2.0-67650242309&doi=10.1111%2fj.1365-246X.2009.04148.x&partnerID=40&md5=5de6de9f138354c9e305f11aa8f648bf Cited by: 54; All Open Access, Bronze Open Access S. Bourouis Francois H. Cornet article Novotný2008123 The western part of the Gulf of Corinth attracts attention due to its seismically active fault system and considerable seismic hazard. Detailed studies of the seismic activity of the region have been carried out especially as part of the so-called Corinth Rift Laboratory (CRL) Project. For standard earthquake locations, the CRL uses the HYPO algorithm and a special structural model that is composed of homogeneous layers (Rigo et al., 1996). This model was derived from a passive seismic experiment in a broader area around the western part of the Gulf. A significant part of the seismic activity is concentrated close to the town of Aigion, which was damaged by a strong earthquake in 1995. A sequence of smaller earthquakes occurred to the south of this town in the year 2001. In the present paper, we have used this sequence to derive an improved structural model for the region in the vicinity of the town of Aigion. This new model is based on the minimization of travel-time residuals. In particular, we used arrival times from a subset of 88 events recorded by at least 5 stations of the southern part of the CRL network, had magnitudes of over 2.3, and were recorded at the nearest station (station code AIO). A variant of the method of conjugate gradients has been used for this purpose. In comparison with the model derived by Rigo et al. (1996), the new model is characterized by a higher νP/νS velocity ratio and by higher velocities to a depth of about 7 km. The new model was derived with the aim to get more accurate locations of future events in the vicinity of the town of Aigion. © Institute of Geophysics of the ASCR, v.v.i 2008. Article 2008 English 00393169 10.1007/s11200-008-0009-z Studia Geophysica et Geodaetica 52 Springer New York 123 – 131 1 Eurasia; Europe; Greece; Gulf of Corinth; Ionian Sea; Mediterranean Sea; Southern Europe; active fault; algorithm; arrival time; crustal structure; earthquake event; gradient analysis; layered medium; modeling; seismic velocity; travel time; upper crust; urban area https://www.scopus.com/inward/record.uri?eid=2-s2.0-43049142664&doi=10.1007%2fs11200-008-0009-z&partnerID=40&md5=62d0601429e322c28584c6bc08d27a9d Cited by: 10 O. Novotný J. Janskü V. Plicka H. Lyon-Caen article Janský2007199 We determine the velocities in an upper crustal model, composed of three homogeneous layers, for one subregion of the western part of the Gulf of Corinth, NE of the town of Aigion, Greece. We have used local events that occurred there in the year 2001 and were recorded by the Corinth Rift Laboratory Network. Weighted P and S arrival time residuals are minimized using the Neighbourhood Algorithm of Sambridge (1999), combined with the grid search for source locations. The resolution of the inversion is tested by delete-one jackknifing. The model obtained is compared with some other models derived or applied to the subregion. A fast velocity increase between depths of 5 and 7 km is confirmed as the major structural element. © Springer Science+Business Media, Inc. 2007. Article 2007 English 13834649 10.1007/s10950-007-9047-1 Journal of Seismology 11 199 – 204 2 Gulf of Corinth; Ionian Sea; Mediterranean Sea; algorithm; arrival time; crustal structure; data inversion; P-wave; S-wave; seismic velocity; upper crust https://www.scopus.com/inward/record.uri?eid=2-s2.0-33947693273&doi=10.1007%2fs10950-007-9047-1&partnerID=40&md5=917f7e108064b80619c7bb82dbaab729 Cited by: 2 Jaromír Janský Vladimír Plicka Hélène Lyon-Caen Oldřich Novotny article Sulem20073 Within the frame of the 'CRL' (Corinth Rift Laboratory project) [Cornet, F., Bernard, P., Moretti, I., (2004a): The Corinth Rift Laboratory, Comptes Rendus Geosciences, 336, 4-5, 235-242.] centered on the south western sector of the Gulf of Corinth (http://www.corinth-rift-lab.org), fault zone cores from the active Aigion Fault have been collected continuously from depths between 708 and 782 m. Inside this clayey core, a clear shearing surface with marked slip lines is visible on a plane that makes a 68° angle with respect to the core axis. This failure surface was not induced by the decompression process but is indeed a slip plane as clear striation is observed at the interface. On the basis of an elasto-plastic constitutive model calibrated on triaxial tests on the clayey gouge, it is shown that shear band formation inside the clayey core is possible. The solution for the orientation of the shear band is compared to the orientation of an existing slip surface inside the clayey gouge and this result is used to deduce the orientation of the principal stresses. It is shown that as commonly observed in weak fault zones, the orientation of the principal stresses is locally almost parallel and perpendicular to the fault axis. © 2007 Elsevier B.V. All rights reserved. Article 2007 English 00401951 10.1016/j.tecto.2007.03.005 Tectonophysics 442 3 – 13 1-4 Gulf of Corinth; Ionian Sea; Mediterranean Sea; active fault; constitutive equation; elastoplasticity; fault zone; shear band; strain analysis; stress analysis; triaxial test https://www.scopus.com/inward/record.uri?eid=2-s2.0-34548307245&doi=10.1016%2fj.tecto.2007.03.005&partnerID=40&md5=755e46565fc3dc2c1cacb34e1d42ecae Cited by: 14; All Open Access, Green Open Access Jean Sulem article Cornet200735 Article 2007 English 18163459 10.2204/iodp.sd.s01.20.2007 Scientific Drilling 35 – 38 1 SUPPL. 1 https://www.scopus.com/inward/record.uri?eid=2-s2.0-50649085149&doi=10.2204%2fiodp.sd.s01.20.2007&partnerID=40&md5=1d2fd87318e57247d705ffdc0bab2228 Cited by: 4; All Open Access, Gold Open Access, Green Open Access François Henri Cornet article Micarelli200631 This paper reviews the data concerning the fracture network and the hydraulic characteristics of faults in an active zone of the Gulf of Corinth. Pressure gap measured through fault planes shows that in this area the active normal faults (Aigion, Helike) act, at least temporarily and locally, as transversal seal. The analysis of the carbonate cements in the fractures on both the hangingwall and the footwall of the faults also suggests that they have acted as local seals during the whole fault zone evolution. However, the pressure and the characteristics of the water samples measured in the wells indicate that meteoric water circulates from the highest part of the relief to the coast, which means it goes through the fault zones. Field quantitative analysis and core studies from the AIG-10 well have been performed to define both regional and fault-related fracture networks. Then laboratory thin section observations have been done to recognize the different fault rocks characterizing the fault zone components. These two kinds of approach give information on the permeability characteristics of the fault zone. To synthesize the data, a schematic conceptual 3D fluid flow modeling has been performed taking into account fault zone permeability architecture, sedimentation, fluid flow, fault vertical offset and meteoric water influx, as well as compaction water flow. This modeling allows us to fit all the data with a model where the fault segments act as a seal whereas the relays between these segments allow for the regional flow from the Peloponnese topographic highs to the coast. © 2006 Elsevier B.V. All rights reserved. Article 2006 English 00401951 10.1016/j.tecto.2006.02.022 Tectonophysics 426 31 – 59 1-2 Gulf of Corinth; Ionian Sea; Mediterranean Sea; active fault; damage mechanics; fault zone; fracture network; normal fault https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749505831&doi=10.1016%2fj.tecto.2006.02.022&partnerID=40&md5=199af1f75c238134f6bb72f85580aa61 Cited by: 54 Luca Micarelli Isabelle Moretti Manon Jaubert Hakim Moulouel article Bernard20067 This paper presents the main recent results obtained by the seismological and geophysical monitoring arrays in operation in the rift of Corinth, Greece. The Corinth Rift Laboratory (CRL) is set up near the western end of the rift, where instrumental seismicity and strain rate is highest. The seismicity is clustered between 5 and 10 km, defining an active layer, gently dipping north, on which the main normal faults, mostly dipping north, are rooting. It may be interpreted as a detachment zone, possibly related to the Phyllade thrust nappe. Young, active normal faults connecting the Aigion to the Psathopyrgos faults seem to control the spatial distribution of the microseismicity. This seismic activity is interpreted as a seismic creep from GPS measurements, which shows evidence for fast continuous slip on the deepest part on the detachment zone. Offshore, either the shallowest part of the faults is creeping, or the strain is relaxed in the shallow sediments, as inferred from the large NS strain gradient reported by GPS. The predicted subsidence of the central part of the rift is well fitted by the new continuous GPS measurements. The location of shallow earthquakes (between 5 and 3.5 km in depth) recorded on the on-shore Helike and Aigion faults are compatible with 50° and 60° mean dip angles, respectively. The offshore faults also show indirect evidence for high dip angles. This strongly differs from the low dip values reported for active faults more to the east of the rift, suggesting a significant structural or rheological change, possibly related to the hypothetical presence of the Phyllade nappe. Large seismic swarms, lasting weeks to months, seem to activate recent synrift as well as pre-rift faults. Most of the faults of the investigated area are in their latest part of cycle, so that the probability of at least one moderate to large earthquake (M = 6 to 6.7) is very high within a few decades. Furthermore, the region west to Aigion is likely to be in an accelerated state of extension, possibly 2 to 3 times its mean interseismic value. High resolution strain measurement, with a borehole dilatometer and long base hydrostatic tiltmeters, started end of 2002. A transient strain has been recorded by the dilatometer, lasting one hour, coincident with a local magnitude 3.7 earthquake. It is most probably associated with a slow slip event of magnitude around 5 ± 0.5. The pore pressure data from the 1 km deep AIG10 borehole, crossing the Aigion fault at depth, shows a 1 MPa overpressure and a large sensitivity to crustal strain changes. © 2006 Elsevier B.V. All rights reserved. Article 2006 English 00401951 10.1016/j.tecto.2006.02.012 Tectonophysics 426 7 – 30 1-2 Gulf of Corinth; Ionian Sea; Mediterranean Sea; active fault; deformation; earthquake magnitude; geophysical survey; normal fault; seismic hazard; seismicity https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749527880&doi=10.1016%2fj.tecto.2006.02.012&partnerID=40&md5=d5c90b0514c7e77340c03b5cb704a2b0 Cited by: 132 P. Bernard H. Lyon-Caen P. Briole A. Deschamps F. Boudin K. Makropoulos P. Papadimitriou F. Lemeille G. Patau H. Billiris D. Paradissis K. Papazissi H. Castarède O. Charade A. Nercessian A. Avallone F. Pacchiani J. Zahradnik S. Sacks A. Linde article Frima2005213 The scope of this work is to quantify the impact of calcite cementation on the hydraulic behaviour of an active fault in carbonate rocks. In the studied context, the permeability mainly depends on the fracture network. Therefore the hydraulic regime depends on the way fractures become sealed by vein deposits. The work is based on the study of cores and groundwater recovered from an active normal fault in the Gulf of Corinth, the Aigion fault, in the framework of the Corinth Rift Laboratory Project. The data set includes cores, borehole images, pumping tests and in situ fluid samples. The cores show numerous recent fractures partially, or completely, sealed by recent carbonate crystals. We modelled the fluid-rock interaction to quantify the growth rate of calcite in the veins of this specific geological context. Modelling was carried out with Diaphore, a software designed to study the diagenetic evolution of porosity in hydrocarbon reservoirs. The required time to seal a 1 mm thick fracture in the case of the Aigion fault at 760 m depth was calculated to be within the range of a few hundred years, considering the composition of water sampled at this depth. As a conclusion, diagenetic processes are likely to have a key influence on the fault hydraulic behavior over the time scale of seismic cycles. However, the possibility of calcite growth strongly depends on the composition of the fluid. Tests were made with seawater and slightly higher values of pCO2, a fluid that could also be present around the Aigion fault. In this case dissolution, and therefore opening of the fractures, happens. Copyright © 2005, Institut français du pétrole. Article 2005 English 12944475 10.2516/ogst:2005013 Oil and Gas Science and Technology 60 Editions Technip 213 – 230 2 Calcite; Carbon dioxide; Carbonates; Cement additives; Computer software; Crystal growth; Crystals; Fracture; Groundwater; Hydrocarbons; Mechanical permeability; Porosity; Rocks; Seismology; Carbonate crystals; Carbonate rocks; Diagenetic processes; Hydraulic behaviour; fracture network; hydraulic property; permeability; Hydraulics https://www.scopus.com/inward/record.uri?eid=2-s2.0-20544433195&doi=10.2516%2fogst%3a2005013&partnerID=40&md5=1b74808e770997e7abbee7b39e7ff232 Cited by: 13; All Open Access, Gold Open Access, Green Open Access C. Frima Isabelle Moretti Etienne Brosse F. Quattrocchi L. Pizzino article Avallone2004301 GPS (Global Positioning System) data collected in the Corinth Rift during eleven campaigns between 1990 and 2001 provide velocities of 57 points with ∼1.5 mm yr-1 accuracy. Peloponnesos moves at 30 mm yr-1 to the N215° E with respect to a fixed Europe. Extension across the rift is accommodated in a narrow band offshore. Its rate increases from east to west and is 16 mm yr-1 near Aigion. Both sides of the rift behave as clockwise rotating blocks with rates of 7±0.5° M yr-1 and 2.8±0.8° M yr-1, respectively for the northern and southern blocks. After removing block rotations, the northern block shows a north-south extension rate of 120±50 nstrain yr-1, whereas the southern block indicates the internal deformation is still inside the error bar (<20 nstrain yr-1). The strain accumulation across the major faults located along the southern coast of the Corinth Gulf is less than 1 mm yr-1. This implies long recurrence periods for large earthquakes on these faults. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2003.12.007 Comptes Rendus - Geoscience 336 301 – 311 4-5 crustal deformation; GPS; rift zone; seismotectonics https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942473593&doi=10.1016%2fj.crte.2003.12.007&partnerID=40&md5=52f3a83eabeacb5a953ee67c65ab09d6 Cited by: 144; All Open Access, Green Open Access Antonio Avallone Pierre Briole Amalia Maria Agatza-Balodimou Harilaos Billiris Olivier Charade Christiana Mitsakaki Alexandre Nercessian Kalliopi Papazissi Dimitris Paradissis George Veis article Prioul2004477 Within the Corinth Rift Laboratory, dipole sonic data have been acquired in the AIG 10 well between depths 711 and 1004 m during three passes of a sonic logging tool at three different borehole fluid pressures. Specific sections of the well reveal clear characteristics of either moderate-to-large azimuthal anisotropy (9-25%) below the Aigion Fault, e.g., 779-784 and 809-816 m, with a fast-shear azimuth directed 105°, or homogeneous isotropic medium (i.e., 735-753 m) between the casing shoe and the fault. The presence of the fault is coincident with the identification of lower velocities over an interval of approximately 12-14 m. Analysis of the data reveals that the formation is not acoustically stress-sensitive to the 3 MPa differential pressure applied. Interpretation of the sonic data with complementary image logs suggests the anisotropy is due to intrinsic fractures and bedding, and the fast-shear direction 105° is consistent with the regional maximum horizontal stress. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2003.11.008 Comptes Rendus - Geoscience 336 477 – 485 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; acoustic logging; borehole geophysics; fault; structural geology https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942537187&doi=10.1016%2fj.crte.2003.11.008&partnerID=40&md5=80f3ffb90eb1643857bbe9bf4ac5cd17 Cited by: 9 Romain Prioul Thomas Plona Michael Kane Bikash Sinha Peter Kaufman Claude Signer article Cornet2004395 The 1000 m-deep AIG10 borehole intersects the Aigion Fault within the limestone of the Pindos nappe at 760 m. It has demonstrated that the fault is dipping 60° with respect to horizontal, an angle consistent with the strength characteristics of the fault material as determined in the laboratory. It does not seem to be listric, as suggested by the location of superficial microseismic events. The fault is about 7 m thick, with a 50 cm core of clay derived from smeared radiolarite formation. The fault offsets the basement rock by 150±20 m and constitutes a hydraulic barrier that sustains a 0.5 MPa differential pressure. Below the fault, a strongly karstified limestone has been encountered down to 1000 m. It is the site of a 0.9 MPa overpressure and exhibits no temperature gradient. Water geochemistry demonstrates the continental origin of this significant flow, which obliterates the regional heat flux. The present monitoring of downhole pressure yields data on tidal variations with a resolution of 1/500 as well as pressure variations induced by teleseisms. Given preliminary results from 14C dating, the age of the fault is about 50 kyr and the mean slip rate equal about 3.5 mm yr-1. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2004.02.002 Comptes Rendus - Geoscience 336 395 – 406 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; active fault; dip; fault plane; fluid flow; hydrogeochemistry; rift zone https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942473545&doi=10.1016%2fj.crte.2004.02.002&partnerID=40&md5=c572aaf90cf05aa6d8963c58882e2257 Cited by: 61 François Cornet Mai Linh Doan Isabelle Moretti Günter Borm article Lyon-Caen2004343 The 12 stations Corinth Rift Laboratory Seismological Network (CRLNET) aims at monitoring the seismicity (Ml>1) in the CRL area and at constraining the geometry of active structures at depth. Two years of microseismicity (2000-2001) recorded by the CRLNET in the Aigion area shows: (1) background seismicity inside the Corinth rift at depth of 4.5-11 km, deepening towards the north and no activity in the upper 4 km of the crust - this seismicity is not clearly related to major faults observed at the surface -; (2) a swarm, 6 km south of the city of Aigion, associated with the Mw=4.2, 8 April 2001 earthquake. This earthquake occurred at 6 km depth, on a SW-NE oriented fault dipping 40° to the northwest and corresponds to normal faulting with a right lateral component of slip. It likely occurred on an old structure reactivated in the present stress field. © 2003 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 English 16310713 10.1016/j.crte.2003.12.004 Comptes Rendus - Geoscience 336 Elsevier Masson SAS 343 – 351 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; earthquake; fault slip; reactivation; rift zone; seismotectonics https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942441394&doi=10.1016%2fj.crte.2003.12.004&partnerID=40&md5=f445abbe2476246a0805bc1f18cf722d Cited by: 70; All Open Access, Green Open Access Hélène Lyon-Caen Panayotis Papadimitriou Anne Deschamps Pascal Bernard Kostas Makropoulos Francesco Pacchiani Geneviève Patau article Léonardi2004385 Two wells have been equipped in 2002, in order to provide complementary hydrological information within the framework of the European project devoted to the Corinth Rift Laboratory. In this distensive tectonic domain, temporal series of flow (Neratzes well) and of piezometric fluid level (Trapeza well) have been recorded in 2002. We present here a first analysis of the data. As far as Trapeza is concerned, we present the first results of the calibration of the well, using the tidal and barometric analyses. The strain sensitivity of the well, as well as the aquifer hydraulic conductivity, is derived from tides, whereas the specific storativity of the aquifer and its confinement degree are estimated from the barometric response. These preliminary results show that the aquifer has got properties that make possible the observation of coupled tectonic/hydrological processes. In addition, the time series let appear some fast and permanent variations of level. We analyse these phenomena and detail the various assumptions, which could explain these processes. As far as Neratzes is concerned, we present the first data measured from the flowmeter. Contrary to the piezometric data, the flow measurements are not conventional. At the end of this first year of measurement, we prove that we are able to record the tides effect using the flowmeter. A prospective analysis of all these results will be drawn. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2003.11.018 Comptes Rendus - Geoscience 336 385 – 393 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; aquifer characterization; flow measurement; hydrological regime; rift zone; seismotectonics; tide https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942473550&doi=10.1016%2fj.crte.2003.11.018&partnerID=40&md5=94580b62d2c9b5200c2c5fca7c8934db Cited by: 5 Véronique Léonardi Pierre Gavrilenko article Naville2004407 Pre-drill reflection surface seismic was carried out in the Aigion city area in February 2001. The poor quality of seismic reflections obtained from standard processing did not allow us to refine the location of the vertical well AIG-10 to be drilled. Subsequently, a brief study of refracted seismic arrivals was attempted in order to better define the well location, in conjunction with observations from a shallow well. In 2002, after drilling, an innovative 6-VSP position well seismic survey was successfully run, using a four-component downhole sensor tool, i.e., three orthogonal geophones and a hydrophone. Refracted seismic events and first arrivals from VSP indicated the throw of the Aigion Fault and the fault plane dip; a secondary accident striking about south-north was detected about 100 m west of the well. No P-P seismic reflection was evidenced from standard VSP processing. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 English 16310713 10.1016/j.crte.2003.12.010 Comptes Rendus - Geoscience 336 407 – 414 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; borehole; fault; rift zone; seismic survey https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942473542&doi=10.1016%2fj.crte.2003.12.010&partnerID=40&md5=9b398018aa9654e58cd7e3096d2875ee Cited by: 14 Charles Naville Sylvain Serbutoviez Isabelle Moretti Jean-Marc Daniel Alexandre Throo François Girard Andreas Sotiriou Akis Tselentis Christos Skarpzelos Christophe Brunet François Cornet article Giurgea2004467 The AIG10 borehole provided direct access to hydraulic conditions. The first results of two open-hole pumping tests and one artesian production test are presented. From the first pumping test in the conglomerates, a hydraulic conductivity of 10-5-10-4 ms-1 was derived and it was suggested that there is a closed hydraulic system bounded by the Aigion Fault zone and other faults farther north. A second pumping test, in the Olonos-Pindos limestones, showed artesian flow (water pressure of 0.5 MPa and flow of 1.9×10-4 m3s-1). The transmissivity is about 4×10-6 m2s-1. Below the fault zone, pressure and flux increased, suggesting karstic water-flow conditions. Water-pressure difference of more than 0.5 MPa between the hangingwall and the footwall provides evidence that the Aigion Fault zone acts as an impervious zone. An artesian production test for the interval 708-1001 m showed a fluid pressure of >1 MPa and natural flow of 1.5×10-2 m3s-1. A transmissivity of 2-3 ×10-4 m2s-1 was determined. A preliminary conceptual hydrogeological model, containing flow parameters and flow paths, is developed, based on data from AIG10 and other wells and springs. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2003.12.012 Comptes Rendus - Geoscience 336 467 – 475 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; borehole logging; fault; hydraulic property; hydrogeology; rift zone; transmissivity https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942505385&doi=10.1016%2fj.crte.2003.12.012&partnerID=40&md5=7f18d5befea7c6ffef1c01866a645370 Cited by: 25 Vlad Giurgea Detlev Rettenmaier Luca Pizzino Ingmar Unkel Heinz Hötzl Andrea Förster Fedora Quattrocchi article Rettenmaier2004415 In the frame of the EU Project Corinth Rift Laboratory (CRL), the AIG10 borehole was successfully drilled from July until September 2002 through the Aigion normal fault in the harbour of Aigion, northern Peloponnesus, Greece. The scientific objective focuses on the investigation of fault mechanics and the relationship with fluid flow and geochemistry, fluid pressure, stress- and strain fields and earthquakes. Recognition of stratification encountered in the AIG10 borehole is based on an online analysis of well cuttings (0-708.8 m and 787.4-1001 m), core descriptions (708.8-787.4 m), monitoring of drilling parameters, as well as a preliminary geophysical well-log interpretation (0-1001 m). Geologically, the area is part of the Olonos-Pindos tectonic nappe, which is overthrusted on the Tripolitza unit during the Alpine orogeny. The litho-log of the AIG10 borehole comprises at first syn-rift deposits (graben fill). At 496 m, the Olonos-Pindos tectonic unit was encountered, however, not as expected in the platy limestones, but in the Olonos-Pindos radiolarite. The borehole has crossed at least one thrust-fault zone and a major normal fault zone at 760 m. This normal fault zone separates well-fractured platy, micritic limestone in the hangingwall from highly fractured radiolarite in the footwall, both of the Olonos-Pindos tectonic unit. The observed succession of multiple imbrication is an indicator of Alpine tectonic activity, whereas normal faulting is of the Miocene-Quaternary extension of the Gulf of Corinth, confirming our expectations gained from geologic-tectonic fieldwork. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved. Article 2004 French 16310713 10.1016/j.crte.2003.12.011 Comptes Rendus - Geoscience 336 415 – 423 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; borehole geophysics; drilling; normal fault; rift zone; seismotectonics; stratigraphic correlation https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942505728&doi=10.1016%2fj.crte.2003.12.011&partnerID=40&md5=d0908c684af0e37a8c7cc28ec5c84770 Cited by: 14 Detlev Rettenmaier Vlad Giurgea Heinz Hötzl Andrea Förster article Cornet2004235 Editorial 2004 English 16310713 10.1016/j.crte.2004.02.001 Comptes Rendus - Geoscience 336 Elsevier Masson SAS 235 – 241 4-5 Gulf of Corinth; Ionian Sea; Mediterranean Sea; rift zone; seismotectonics https://www.scopus.com/inward/record.uri?eid=2-s2.0-1942537641&doi=10.1016%2fj.crte.2004.02.001&partnerID=40&md5=d514674844f86e45db90ef939e4b3c8f Cited by: 27 Francois H. Cornet Pascal Bernard Isabelle Moretti article Micarelli2003275 In the frame of the Corinth Rift Laboratory project, which aims to understand the relation between stress, strain and fluid flow in an extensional context, three normal faults have been studied and sampled in the south-western sector of the Gulf of Corinth. Two of these faults (the Pirgaki and Helike faults) juxtapose carbonate pre-rift sediments and syn-rift conglomerates at outcrop, and the third (the Aigion fault) has been drilled and cored at 760 m depth. The distance between the faults is around 4 km, and the offsets are approximately 1000, 700 and 170 m, respectively. The fault damage zones and cores of the analysed faults exhibit different geometry, size and textural characteristics. In general, it has been assessed that fault cores behave as near-impermeable barriers to transverse fluid flow, whereas highly fractured damage zones act mostly as conduits for nearly along-strike flow. Different types of fault rocks are exposed along the main faults; these include cataclasite, ultra-cataclasite, fault breccia and gouge, with random or foliated fabrics. Along the Pirgaki fault zone only, fault rock micro-fabrics have been related to multiple tectonic episodes. The results of our work also emphasise that the current conditions of deformation, in this sector of the Gulf of Corinth, are responsible for the development of a system of extension fractures that is only partially sealed. These fractures mainly control the permeability structure of the analysed fault zones and furnish information on the stress field acting in the area. Furthermore, their orientation and distribution indicate that they are consistent with a deformation pattern resulting from active extension. © 2003 Elsevier Ltd. All rights reserved. Article 2003 English 02643707 10.1016/S0264-3707(03)00051-6 Journal of Geodynamics 36 Elsevier Ltd 275 – 303 1-2 Greece; Gulf of Corinth; deformation; faulting; neotectonics; rift zone; seismicity; tectonics https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037962295&doi=10.1016%2fS0264-3707%2803%2900051-6&partnerID=40&md5=aac16d597059973447ab88c7904dcffd Cited by: 88 L. Micarelli I. Moretti J.M. Daniel article Moretti2003323 The Gulf of Corinth is often considered as a typical example of a more or less simple half graben with major border faults to the south and a flexure of the northern shore. This paper reviews new data, especially subsurface data, from both onshore and offshore, compiled or acquired through the Corinth Rift Laboratory EEC project. This data indicate that (1) the Gulf of Corinth is bordered both north and south by active faults; (2) there is a lot of them, and not only the one bordering the Peloponnese coastline are still active; and (3) distinct opening phases may be recognized on the area. During the first phase, the depocenter was located near the northern shore, whereas during the most recent phase, and only in the centre and the eastern sector, the depocenter moved towards the southern shore. Furthermore, active tectonic, in this western sector, is characterised by a general uplift of the Peloponnese that leads to the formation of new faults, i.e. the Doumena, Aigion and Helike faults and to selective reactivation of older ones such as the Pirgaki fault. We suggest that this current tectonic phase started about 150-120 000 years ago in the Aigion area and about 350 000 years ago eastward (Corinth-city) and that it represents a third opening phase during the growth of the Gulf of Corinth. © 2003 Elsevier Ltd. All rights reserved. Article 2003 English 02643707 10.1016/S0264-3707(03)00053-X Journal of Geodynamics 36 Elsevier Ltd 323 – 340 1-2 Greece; Gulf of Corinth; active fault; deformation; faulting; graben; neotectonics; rift zone; tectonics https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037659797&doi=10.1016%2fS0264-3707%2803%2900053-X&partnerID=40&md5=d646e9c458b7dcd66112a459e50ea509 Cited by: 132 Isabelle Moretti D. Sakellariou V. Lykousis L. Micarelli article Cornet20031257 Relationships between flow distributions and mechanical opening in a single natural fracture are investigated in situ through field experiments, at a scale of about 1 m, in a granitic quarry. Experiments have been conducted at various injection flow-rates while the normal stress applied to the fracture was controlled by hydraulic flat jacks. Variations of the collected flow-rate (monitored through contiguous flow collectors distributed along the fracture periphery) with the injection pressure are fully reproducible. They show that the fracture opens only above a threshold pressure which increases with the externally applied stress. This threshold is non-zero with no applied flat jacks pressure which raises questions on the reliability of hydraulic jacking techniques for the measurement of the normal stress on preexisting fractures. It is shown that equivalent hydraulic aperture and mechanical opening are comparable only above a critical mean fracture opening estimated to be around 15-20 μm for the tested granite. For mean fracture openings smaller than this value, the standard time scale used for stress measurements distorts the results. It is also shown that channeling effects may control flow away from the injection hole so that the hydraulic jacking stress measurement technique may overestimate the mean normal stress acting on the fracture plane by as much as 4 MPa. It is concluded that hydraulic testing techniques for normal stress measurements should not include results from the fracture opening phase. Moreover, criteria should be established for validating results from the closing phase in order to demonstrate the absence of channelling effects. Finally, it is shown that, because of the elastic response of the rock, water injection in a fracture system decreases the interstitial pressure ahead of the increasing pressure front associated with the water flow. © 2003 Elsevier Ltd. All rights reserved. Article 2003 English 13651609 10.1016/S1365-1609(03)00120-5 International Journal of Rock Mechanics and Mining Sciences 40 Elsevier BV 1257 – 1270 7-8 Elasticity; Fracture; Granite; Quarrying; Water; Hydromechanical behavior; fracture flow; hydromechanics; in situ stress; rock mechanics; stress measurement; Rock mechanics https://www.scopus.com/inward/record.uri?eid=2-s2.0-0142230374&doi=10.1016%2fS1365-1609%2803%2900120-5&partnerID=40&md5=be0cac1552fd8faed0d4c593d3aa6ff6 Cited by: 50 F.H. Cornet L. Li J.-P. Hulin I. Ippolito P. Kurowski article Moretti200291 In their aim to understand the hydraulic behaviour of faults and fractures, and their changes with stress variation, geoscientists are still poorly armed. On the one hand, data indicate that the rheology of faulted strata plays a major role: shale may create clay smearing (Lehner & Pilaar 1997), whereas, at temperatures over 80/100 °C, pressure solution processes quickly seal fractures in sandstones after rupture (Morentti et al. 2000; Labaume & Moretti 2001). The hydraulic behaviour of discontinuities also appears to be stress-dependent (Sibson 1994), and may therefore change during the depletion of oil and gas fields. We are still unable to quantify these changes and indicate eventualthresholds. On the other hand, fluid pressureinfluences the friction on the fault planes, and therefore changes the rate of displacement. A large number of seismologists consider that the low average friction coefficient in large fault zones is due to high fluid pressure (Evans 1992 and many others). The permanent and instantaneous hydraulic behaviour of faults and fractures under a stress/strain regime obviously differs due to diagenetic processes, but the rate of the fluid/rock interactions which could be related to the build up of high pressures in the faults themselvesis still a subject of debate. In order to clarify these issued, a complete dataset is necessary. European academicand private laboratories (as well as someoil companies) have decided to pool their efforts to collect such a dataset by creating the Corinth Rift Laboratory (CRL), with the help of the EC. The goal is to investigate fault mechanics and their relation to fluid flow and earthquakes by continuous monitoring of strain, seismicity, fluid pressure and geochemistry - at the surface and at various depths in boreholes intersecting active faults. Due to the volume of data collected and the necessity of disctributing these data to various centres, research in data management is also being carried out. Around the world, two other ambitious projects have been set up with the same goals but in different geological contexts: one to monitor the San Andreas fault, which is a strike-slip fault outcropping in granite, and a second to drill the subduction zone in Japan. In our case, we will drill extensional faults through sedimentary rocks; mainly limestones. Article 2002 English 02635046 10.1046/j.1365-2397.2002.00242.x First Break 20 91 – 97 2 active fault; hydraulic property; pressure solution; rheology; stress change https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036173570&doi=10.1046%2fj.1365-2397.2002.00242.x&partnerID=40&md5=e6de1e1628ad16d86fd63d4374ec0fc0 Cited by: 17 I. Moretti J.P. Delhomme F. Cornet P. Bernard C. Schmidt-Hattenberger G. Borm