The Hebgen Lake fault after the magnitude 7.5
Hebgen Lake, Montana earthquake.
Yellowstone Seismic & GPS Monitoring Summary
Monday, July 2, 2012 01:25 PM MDT
Seismicity Summary: During the month of June 2012, the University of Utah reports 48 earthquakes were located in the Yellowstone National Park region. The largest was a magnitude 2.7 event on June 17 at 09:27 PM MDT, located about 6.6 miles southeast of Canyon Junction, YNP. No earthquake swarms were detected in June. Yellowstone earthquake activity remains at a relatively low background level.
Ground Deformation Summary: Slow subsidence of the caldera, which began in early 2010, continues. Current deformation patterns at Yellowstone are well within historical norms. Please see: http://www.uusatrg.utah.edu/ts_ysrp.html for a map of GPS stations in the Yellowstone vicinity. For a graph of daily GPS positions at White Lake, within the Yellowstone caldera, please see: http://pbo.unavco.org/station/overview/WLWY.
This information is taken from the Yellowstone Monthly Activity Update at the Yellowstone Volcano Observatory (YVO) Website.
Current seismic activity in Yellowstone can also be found on the University of Utah Seismograph Stations (UUSS) website at: