Friday, June 23, 2017

Scientists study swarm of Yellowstone earthquakes

Seismologists are studying a swarm of 500-plus earthquakes that have rattled the Yellowstone Park area since June 12.

Most are centered 8 miles north-northeast of West Yellowstone.  That is just a few miles east of the Hebgen Lake Basin, the site of the historic 1959 quake.  That one measured 7.3 on the Richter scale, killed 28 people and created Quake Lake, near the Gallatin National Forest.

Mike Stickney, of the Earthquake Studies office at Montana Tech, said earthquake swarms are normal in Yellowstone.  He says many are smaller.  When we checked we found dozens that measured under 2.0 on the Richter scale.

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