During the month of August 2011, 25 earthquakes were located in the Yellowstone National Park region. The largest was a magnitude 2.0 event on August 10 at 10:46 AM MDT, located about 18 miles northeast of Fishing Bridge, WY. No swarms were recorded in August.
Earthquake activity continues at relatively low background levels.
Ground Deformation Summary: A strong seasonal signal, probably related to last winter's extraordinary (~200% of normal) snowfall, is apparent on many of the GPS records in and well outside Yellowstone. This signal complicates interpretation of the GPS data, but detailed analysis indicates that caldera subsidence, which began about 1.5 years ago, likely persists. YVO scientists are working to understand the nature of the unusual signal, and will continue to monitor it carefully.
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://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The Moon is Waxing Gibbous (73% of Full)
Yellowstone Monthly Update issued Sep 1, 2011 15:20 MDT Volcano Alert Level NORMAL
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September 01, 2011 02:34PM |
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