Physical Location of Hole: On the resurgent dome of Long Valley Caldera, in eastern California

Scientific Significance: The Long Valley Exploratory Well (LVEW) was drilled to assess the potential of a deep geothermal resource beneath the resurgent dome, help improve assessments of volcanic risk from major or minor volcanic eruptions emanating from the central caldera, and provide a “hole of opportunity” for testing drilling instruments and technology.

 

Period of Coring: July through September 1998

Funding Agency: USGS

DOSECC Drilling System Used: DOSECC Hybrid Coring System

Number of Holes Drilled: One, deepened the existing “LVEW”

Diameter of Hole: 4.5 inch

Diameter of Core Samples: 2.5 inch

Maximum Depth Reached: 9,831 feet

Number of Coring Days: 51

Average Footage per day of Coring: 52.1 feet/day

Challenges Met: Successfully field tested DOSECC Hybid Coring System

33rd International Geological Congress
6–14 August 2008
Oslo, Norway

IRIS Real-Time Earthquake Map

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DOSECC Workshop
3–5 June 2007
Washington, DC