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Global Volcanism Program | Image GVP-03298

The Casa Diablo geothermal plant in the Long Valley caldera taps the high heat flow originating from the magma system below. Several commercial and scientific exploratory holes have been drilled here to depths of 100 to 2,000 m. Photo by Larry Mastin, 1991 (U.S. Geological Survey).

The Casa Diablo geothermal plant in the Long Valley caldera taps the high heat flow originating from the magma system below. Several commercial and scientific exploratory holes have been drilled here to depths of 100 to 2,000 m.

Photo by Larry Mastin, 1991 (U.S. Geological Survey).

Keywords: geothermal | caldera


Long Valley