Earthquakes
Earthquakes
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Geologic history of the Long Valley, Mono Basin region
Geologic history of the Long Valley, Mono Basin region.
Seismic Monitoring at Long Valley Caldera
Seismic monitoring is the most used technique for volcano surveillance.
Volcano Hazards in the Long Valley - Mono Lake Area, California
Volcanic unrest through the 1980's to 1990's in the southern part of the Long Valley caldera reminds us that the volcanic system is young. Volcanic activity and related hazards are likely in the future. USGS scientists closely monitor the area and research past activity to better understand what might happen in the future.
Long-term outlook for volcanic activity in Long Valley caldera
The area of eastern California that includes the Long Valley Caldera and the Mono-Inyo Craters volcanic chain has a long history of geologic activity that includes both earthquakes and volcanic eruptions. This activity is likely to continue long into the future.
Mammoth Mountain
Mammoth Mountain is a 3,369-m (11,053-ft) high volcano lies west of the structural rim of the caldera and is considered to represent a magmatic system distinct from Long Valley Caldera and the Mono-Inyo Craters.
Faults and fissures in the Long Valley Area, California
The area surrounding Long Valley caldera and the Mono-Inyo Craters volcanic chain is cut by a complicated mix of dozens of major north-northwest trending faults and down-faulted blocks called "grabens."