Volcano activity of October 30, 2012 – Vigorous deep low-frequency earthquake swarm beneath Mammoth Mountain CA

Last update: October 30, 2012 at 11:39 pm

By Richard Wilson and Armand Vervaeck

This (almost) daily post intends to follow up the activity changes of volcanoes all over the world.
This post is written by geologist Richard Wilson who specializes in Volcano seismicity and Armand Vervaeck. Please feel free to tell us about new or changed activity if we haven’t written about it. -

Just saw this developing tonight beneath Mammoth Mountain volcano CA.

While these events are not uncommon at Mammoth, this episode is especially vigorous and is accompanied by appreciable deformation
(extension) across the volcano. 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.

Rodger

Related articles

• Tjörnes Fracture Zone volcano: seismic swarm continues with no end in sight
• Increase in seismicity around Salton Sea region linked to rifting of California

About James Smith
James is a father of four and grandfather to four cute little bugs. He and his wife Beautiful Gorgeous, of almost 30 years, have been prepping since 2003.
View all posts by James Smith →