California Supervolcano is Cooling Off but May Still Cause Quakes — the Long Valley Caldera, sits atop a massive dormant supervolcano. Eastern Sierra Nevada. Long Valley Caldera is adjacent to Mammoth Mountain. The valley is one of the Earth's largest calderas.
California supervolcano is cooling off but may still cause quakes
California Supervolcano: Caltech’s “Chilling” Discovery in Long Valley Caldera