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Mammoth Mountain volcano
lava domes 3369 m / 11,053 ft
California, USA, 37.63°N / -119.03°W
Current status: normal or dormant (1 out of 5)
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Mammoth Mountain volcano eruptions:
1260 ± 40 years
Typical eruption style:
effusive
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News & activity updates

Mammoth Mountain (California, USA): strong seismic swarm and deformation recorded

Wednesday Oct 31, 2012 12:05 PM | BY: T

Time and depth of quakes under Mammoth Mountain during the past week
Time and depth of quakes under Mammoth Mountain during the past week
A stronger than usual seismic swarm was recorded beneath Mammoth Mountain volcano in California during 29 October. The swarm, in such not uncommon, was accompanied by slight deformation
(extension) across the volcano. Such deep low-frequency events occur in the middle to lower crust and are believed to be caused by the transit of magma or magmatic fluids upward beneath volcanoes. Such episodes at Mammoth may be followed (within days to weeks) by shallow
earthquake swarms.
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