250 temblors rattle Yellowstone

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250 temblors rattle Yellowstone
May be Precursor

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30 Dec 08 - More than 250 small earthquakes rattled Yellowstone super-volcano over the weekend and into Monday. Seismologists and volcanologists are monitoring very closely to see if this could be a precursor to a larger event.

Earthquake swarms in the Yellowstone area are not uncommon, but this is unusual.

Robert Smith, a professor of geophysics at the University of Utah says: "They're certainly not normal - we haven't had earthquakes in this energy or extent in many years."

"This is an active volcanic and tectonic area and these are the kinds of things we have to pay attention to," Smith said. "We might be seeing something precursory.”

Professor Smith directs the Yellowstone Seismic Network, which operates seismic stations around the park. He said the quakes have ranged in strength from barely detectable to one of magnitude 3.9 that happened Saturday.
See: http://www.cbsnews.com/stories/2008/12/30/national/main4691128.shtml

                It's interesting to note that the last major eruption of Yellowstone
                some 640,000 years ago coincided with a geomagnetic reversal
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For more background on Yellowstone, see also:
http://www.iceagenow/Supervolcano

http://www.iceagenow.com/Yellowstone_Volcano_Rising_At_Record_Rate.htm

http://www.iceagenow.com/Yellowstone_Slumbering_Giant.htm

http://www.iceagenow.com/Supervolcanoes-Ticking_Time_Bomb

Earthquakes of Dec 28-30, 2008
http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/US2/43.45.-111.-109_eqs.php

 

 



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