Long Valley

The Casa Diablo geothermal plant in the Long Valley caldera taps the high heat flow originating from a magma body beneath the Long Valley caldera. Several commercial and scientific exploratory holes have been drilled here to depths of 100 to 2000 m.

Type/Process: Volcanoes and Humans
Volcanic Status: Pleistocene-Fumarolic
Image Number: 032-098
Photographer: Larry Mastin (U.S. Geological Survey)
Summit Elevation: 3390 meters
Latitude/Longitude: 37.70 N / 118.87 W
Timeframe: Quaternary eruption(s) with the only known Holocene activity being hydrothermal
Region: Canada and Western USA