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Long Valley volcano
caldera 3390 m / 11,122 ft
California, 37.7°N / -118.87°W
Current status: normal or dormant (1 out of 5)
Long Valley webcams / live data | Reports
Books
Long Valley volcano eruptions:
111,000-57,000 years ago (formation of Mammoth Mountain)
Typical eruption style:
Explosive
Last earthquakes nearby
Latest satellite images

Sentinel hub | Landsat 8
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Latest news & updates for Long Valley Caldera volcano

Long Valley volcano (California) activity update: small earthquake swarms

Fri, 24 Aug 2012, 12:05
12:05 PM | BY: T
Small earthquake swarm at Long Valley on 24 Aug 2012
Small earthquake swarm at Long Valley on 24 Aug 2012
A small earthquake swarm has developed at the southern margin of the caldera, just north of Convict Lakes. The largest was a 2.5 event at 10 km depth.
Continuous GPS data over the last several months have shown a modest inflation within the caldera, with ground motion directed upward and away from the caldera's center, with a maximum uplift rate between 2 and 3 cm/yr.
Horizontal deformation is similar in magnitude, with a N/S extension rate across the caldera's center of about 3 cm/yr. These rates of deformation are comparable to those observed in 2002-2003, and well below the rates seen in the late 1990s.
(Source: USGS Aug 2012 update for Long Valley)
Previous news
Tue, 14 Aug 2012, 11:17
Location of the recent quakes at Long Valley (red dots for 12-13 Aug)
A small swarm of earthquakes could be during 12-13 Aug. About 30 (very small mostly ... read all
 

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