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Link: http://www.activistpost.com/2017/09/yellowstone-approaches-record-levels-seismic-activity.html
A cluster of earthquakes at the Yellowstone Park volcano is the most active it’s been in recent history. The earthquake count is up to 2,357 since June with the largest having a magnitude of 4.4. A swarm of earthquakes is rather normal for Yellowstone, but the number of quakes is approaching a new record.
The current swarm is approaching the record set in 1985 when three months brought over 3,000 earthquakes. In 2010 a swarm brought over 2,000 earthquakes over a month. The last volcanic eruption within the caldera [crater] was 70,000 years ago