Geothermal fields in California
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Photograph showing a close-up view of the geysers in a geothermal field in California. This is probably the Geysers geothermal field, which is located on the southwest side of the Clear Lake volcanic field in Sonoma County, California. The Geysers is the largest producing geothermal field in the world with installed electrical generating capacity of about 2,000 megawatts, and it produces enough electricity for about two cities the size of San Francisco. Gravity and teleseismic studies suggest that a large silicic magna chamber, which is around fourteen kilometers in diameter, lies about seven ...