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More Than 600 Earthquakes Recorded in Current Yellowstone Earthquake Swarm
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Trend in Earthquakes - Upward
January 21, 2010
By Howard Pankratz
The Denver Post
The swarm of earthquakes at Yellowstone National Park which started Sunday
has produced 644 tremors through 1:36 p.m. Wednesday, scientists at the
University of Utah said this afternoon.
So far Wednesday, the the magnitude of the earthquakes has been in the 2.5
range or slightly lower.
Several tremors about 3.0 above were recorded on Tuesday.
As of 3 p.m. Tuesday, a total of 469 earthquakes had been recorded since
Sunday, meaning another 175 quakes occurred in the past 22 hours.
The earthquakes have been reported by multiple people in the park itself,
and in neighboring communities in Montana and Idaho.
Jamie Farrell, a doctoral student in geophysics at the University of Utah,
said the quakes are occurring in an area about 5 miles from where the
largest swarm of quakes was ever recorded in October 1985.
The area is six miles due west of Yellowstone National Park's Lower Geyser
Basin, which is several miles north of Old Faithful.
Farrell said that there have been no reports of the quakes affecting the
geysers in the park.
The most devastating earthquake in recent history in the Yellowstone region
occurred on Aug. 17, 1959, when a magnitude 7.3 earthquake hit. It was
centered near Hebgen Lake, Mont., killed 28 people and caused more than $11
million in damage.
Read more: http://www.denverpo st.com/news/ ci_14231259# ixzz0dFvtNJUI
http://www.denverpo st.com/headlines /ci_14231259
http://www.millenni um-ark.net/ NEWS/10_Earth_ Changes/100121. Yellowstone.
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