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Unzen Scientific Drilling Project

Project Acronym: USDP | State: Completed | Expedition ID: 5010

The volcanic eruptions at Unzen (Japan) during 1990-1995 took a heavy toll on life and property through devastating pyroclastic flow events. In order to understand the structure and growth history of the volcano and to clarify the eruption mechanisms of SiO2-rich viscous magmas, the Unzen Scientific Drilling Project (USDP) was started in April 1999. The magma conduit, especially its upper part, is believed to be the site of effective degassing that is the major factor controlling eruption styles. Drilling into this region allowed for the first in situ observations and sampling of the still-hot conduit and wall rocks of a recent, well-observed eruption.

Keywords: Asia, Japan, Kyushu, Shimabara, Active Volcano, Conduit, Directional Drilling, Explosion, Hazards, Thermal Regimes, USDP, Volcanic Systems

Project Details

Project Location

Project Timeline

Drilling 2

1 May - 31 July 2004

Drilling 1

13 February - 17 November 2003

Full Proposal Approved

Workshop Held

2 - 4 October 2000 in Shimabara, Japan

Workshop Proposal Approved

Preliminary Proposal Submitted