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5/06/2007

Series of Quakes Swarm Yellowstone Park

Click Map to Enlarge: Simplified map of Yellowstone National Park, caldera, and resurgent domes(locations of benchmarks and place names referred to in leveling data) Curtosy USGS C

Volcanic/Seismic Alert
Yellowstone National Park
Wyoming, USA

May 5, 2007
A “swarm” of 16 small earthquakes measuring up to 2.7 on the open-ended quake scale shook Yellowstone National Park’s Pitchstone Plateau from Monday through Wednesday.A seismograph network operated by the University of Utah and partners recorded the temblors, which started a few minutes before midnight Tuesday. The largest occurred at 3:09 a.m. Tuesday and the series continued until Wednesday when it finally died down.The quakes all were centered in the middle of the plateau, a lava dome at the southern end of the park. Geophysicist Dr. Bob Smith, a University of Utah professor and a Jackson Hole homeowner, said he was working the night the swarm started and found it “interesting and intriguing.”“I was up working and watching these, saying ‘Whoa, what does this all mean?’” Smith said in a telephone interview from Utah on Thursday. “It kept my interest quite high.”
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