YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATEMonday, March 3, 2014 11:58 AM MST (Monday, March 3, 2014 18:58 UTC)

YELLOWSTONE VOLCANO (VNUM #325010)
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 ground deformation occurring in north-central Yellowstone, which we reported in an Information Statement on February 18, 2014, continues. In March, YVO plans to deploy several additional GPS instruments to learn more about this scientifically interesting deformation episode. Caldera subsidence, which began in 2010, appears to be slowing. All the deformation currently occurring in Yellowstone remains well within historical norms.

During February 2014, the University of Utah reports 245 earthquakes were located in the Yellowstone National Park region. February seismicity in Yellowstone was marked by an ongoing cluster of 153 earthquakes, located about 5 miles WNW of Norris Geyser Basin, YNP, that persisted throughout the month. The cluster included the largest event of the month, which was a minor earthquake of magnitude 3.5 on February 11, 2014 at 4:03 PM MST.

Although seismicity over Yellowstone as a whole is only slightly above normal, seismicity levels in the deforming region in the north-central part of the Park have increased since the deformation began. This correlation is neither worrisome nor surprising since ground deformation and small earthquakes often occur together.

Please see: http://volcanoes.usgs.gov/observatories/yvo/YVO_GPS.jpg for a map of GPS stations in Yellowstone. For a graph of daily GPS positions at NRWY, a station about 1.5 miles SE of Norris Geyser Basin, please see: http://pbo.unavco.org/station/overview/NRWY. For GPS positions at WLWY, near White Lake in the northeastern part of Yellowstone caldera, please see: http://pbo.unavco.org/station/overview/WLWY.

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

CONTACT INFORMATION:
Jacob Lowenstern, Scientist-in-Charge
jlwnstrn@usgs.gov



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