Abstract
A geothermal test hole drilled 810 m into the summit crater of Newberry Volcano in Oregon measured 190°C, the hottest temperature measured so far in an Oregon geothermal energy prospect. What's more, a high temperature gradient discovered in the lower sixth of the test hole may point to greater potential than was previously thought for geothermal energy in the Cascade Range.Scientists from the U.S. Geological Survey found that in the hole's lower 140 m the temperature rose at a rate equivalent to about 600°C per kilometer. The worldwide continental average is about 30°C per kilometer. Edward Sammel, a USGS hydrologist, is the leader of the geothermal drilling project at Newberry. David Blackwell of the Southern Methodist University made the temperature measurements in the hole.
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