Yellowstone Monthly Update issued Aug 1, 2012 12:26 MDT Volcano Alert Level NORMAL - Aviation Color Code GREEN

During the month of July 2012, the University of Utah reports 72 earthquakes were located in the Yellowstone National Park region. The largest was a magnitude 2.9 event on July 4 at 09:20 AM MDT, located about 5 miles southwest of West Yellowstone, MT. A swarm of 16 earthquakes was located about 10 miles north of West Yellowstone. The swarm spanned July 24-26 with magnitudes ranging from -0.1 to 2.3. Yellowstone earthquake activity remains at a relatively low background level. Slow subsidence of the caldera, which began in early 2010, continues. Current deformation patterns at ...

http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=7578