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The mountainous region in
Northern California has been struck by a magnitude 5.2 earthquake on Tuesday
night, at 8:03 p.m. at epicenter.
According to the U.S. Geological
Survey, the quake centered 11 miles from Willow Creek, CA and lasted less than
10 seconds. Three short aftershocks were recorded after that, with the largest
measuring a magnitude 2.4, USGS reported.
Immediately after the mainshock,
USGS said there is a 10 percent possibility for a damaging aftershock to take
place in the next seven days. However, this time no damages or injuries have
been reported.
USGS also warned that within the
next seven days, people in the area might experience approximately 3 to 20 aftershocks,
but they will most likely be small ones and won’t create any damages.
California is known to be
exposed to earthquakes due to the San Andreas Fault, as well as other faults in
the area, thus it is vulnerable to tsunamis as well. However, according to the
U.S. Geological Survey, no tsunami warning was necessary on Tuesday night.
The earliest reported earthquake
in California was felt in 1769 by the exploring expedition of Gaspar de Portola
while the group was camping about 48 kilometers (30 miles) southeast of Los
Angeles.
Each year California faces more
than 10,000 earthquakes in its south part alone. Most of them are so small that
they are not even felt, and only several hundred of them are greater than
magnitude 3.0, and only about 15-20 are greater than magnitude 4.0.
Image Credit: http://neic.usgs.gov/
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