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(AP file photo) YELLOWSTONE NATIONAL PARK, Wyo. (AP) -- Add another small earthquake to the swarm of temblors that have rattled Yellowstone National Park in recent days.
The U.S. Geological Survey says a 3.3-magnitude earthquake struck at 8:39 p.m. Monday, and it was centered 9 miles southeast of the town of West Yellowstone, Mont. No damages or injuries have been reported.
Rafael Abreu, a USGS geophysicist, says a swarm of earthquakes has hit the park in recent days, which is normal.
Jamie Farrell, a doctoral student at the University of Utah, says the swarms generally last from a few days to weeks but sometimes last for months.
The recent series of quakes started Sunday night, and Farrell says more than 200 had been counted by 9 a.m. Monday.
On Monday night, the USGS says, one person within the park had reported feeling the 3.3-magnitude quake.
(Copyright 2010 by The Associated Press. All Rights Reserved.)
