A deep Geophysical Observatory at the North Anatolian Fault using a Borehole-Based Seismometer Network at the Eastern Sea of Marmara

Instrument array at 298 m with sensor (2 Hz / 15 Hz), at 225.64 m 1 sensor (1 Hz), at 153.28 m 1 sensor (1 Hz), at 74.89 m 1 sensor (1 Hz)

8 ½” borehole, static temperature <40 °C, max. depth 300 m, still operating

Oct. 2012: Successfully cemented to surface in the hole by means of a PVC pipe string. Cementing string left in the hole. All sensors in operation.