The massive 7.2-magnitude Hebgen Lake earthquake on August 17, 1959 is still affecting the Yellowstone National Park region, according to a team of geophysicists at the University of Utah, who say a swarm of up to 3,000 events near Maple Creek from June 2017 to June 2018 is tied to that event.
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Yellowstone has seen a spate of seismic activity since early February, with over 200 incidents recorded in the latest earthquake swarm.
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There have been more than 460 earthquakes in and around Yellowstone National Park, according to seismologists at the University of Utah.
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A central Idaho earthquake swarm could provide insight into plate tectonics in Yellowstone National Park.
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Yellowstone Insider Your Complete Guide to America's First National Park