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Yellowstone volcano
super-volcano, calderas 2805 m / 9,203 feet
Wyoming, USA, 44.43°N / -110.67°W
Current status: dormant (1 out of 5)
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Yellowstone volcano eruptions:
1350 BC ± 200 years
caldera-forming eruptions 70,000 BP, 160,000 BP, and 640,000 years ago (BP)
Typical eruption style:
explosive
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Yellowstone volcano: activity updates

Yellowstone caldera volcano (Wyoming, USA): elevated seismic activity, but within normal activity range

Friday Nov 02, 2012 08:42 AM | BY: T

Time and depth of quakes at Yellowstone during Oct 2012
Time and depth of quakes at Yellowstone during Oct 2012
Yellowstone earthquake activity remains at background levels.
During October 2012, 128 earthquakes were recorded in the Yellowstone National Park region. The largest were a pair of magnitude 3.1 events on October 14 at 8:55 PM and 9:21 PM MDT, located about 18 miles south southwest of West Yellowstone, MT.
These events were part of a swarm of 55 quakes recorded October 14 -16, with magnitudes ranging from M 0.9 to M 3.1.
The swarm resumed briefly on October 26 with an additional 8 events, M 1.4 to M 2.3 located in the same area on the western edge of the Madison Plateau.
Slow subsidence of the caldera, which began in early 2010, continues. Current deformation patterns at Yellowstone are well within historical norms.
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Links / Sources:
Previous news
Current seismic signal b207 station (Univ. Utah / USGS)
Sunday, Oct 07, 2012
A small earthquake swarm occurred under the Yellowstone caldera. The quakes are few and very small and no indicator of an impending eruption. It completely falls under what is normal behavior of an active caldera. [more]

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