Volcano Update from Archive

Sunday, September 15, 2013 12:00 PM MDT (Sunday, September 15, 2013 18:00 UTC)

44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

The University of Utah, a YVO member agency, has sent out the following press release about a magnitude 3.6 earthquake that occurred amid three ongoing earthquake swarms in Yellowstone National Park.

The current earthquake swarms are well within established norms for the Yellowstone region and the Yellowstone Volcano Observatory has determined that they present no volcanic hazard.

Press Release

University of Utah Seismograph Stations

Released: September 15, 2013 11:07 AM MDT

The University of Utah Seismograph Stations reports that a light
earthquake of magnitude 3.6 occurred at 09:53:02 AM on September 15,
2013 (MDT) that was felt by persons in Yellowstone. The epicenter of
the shock was located in Yellowstone National Park near the Lower
Geyser Basin area, 8 miles north of Old Faithful, and 15 miles SE of
the town of West Yellowstone, Montana. This earthquake is the largest
of an ongoing sequence of swarms that began on September 10, 2013 and
has included swarms near Lewis Lake, the Lower Geyser Basin and in an
area NW of Norris Geyser Basin. A total of 130 earthquakes of
magnitude 0.6 to 3.6 have occurred in these three areas however, most
have occurred near the Lower Geyser Basin. Notably much of the
seismicity in Yellowstone occurs as swarms. The University of Utah
Seismograph Stations continues to monitor Yellowstone earthquakes and
will provide additional information if the earthquake swarm activity
increases. Anyone who felt any of these earthquakes is encouraged to
fill out a felt report on the U.S. Geological Survey website at:

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

YVO Member agencies: USGS, Yellowstone National Park, University of Utah, University of Wyoming, UNAVCO, Inc., Wyoming State Geological Survey, Montana Bureau of Mines and Geology, Idaho Geological Survey

Peter Cervelli, Deputy Scientist-in-Charge, USGS
pcervelli@usgs.gov (650) 208-4414