Volcanic Gas
Volcanic Gas
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Long Valley Caldera Field Guide - Horseshoe Lake
Volcanic carbon dioxide can kill trees and is a hazard to animal life.
Long Valley Caldera Field Guide - Mammoth Mountain
Hike, ski, or bike on a series of domes. A good vantage point for seeing entire Caldera.
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.
Gas Monitoring at Long Valley and the Surrounding Region
By monitoring the relative abundances of carbon dioxide (CO2) and sulfur dioxide (SO2), scientists may be able to infer magma movement through the volcanic system.
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.