Great
Earthquakes In Diverse Places
California: Eight earthquakes hit Berkeley over past several
days
By Soumya Karlamangla | Senior Staff
Monday, October 24, 2011 at 8:52 pm
The Daily Californian
Since Thursday, Berkeley has been at the center of at least eight
earthquakes.
The first, and largest, was a 4.0 magnitude quake that hit just
before 3 p.m. Thursday and was centered under South Berkeley,
according to U.S. Geological Survey. The temblor was followed by
three smaller earthquakes in the afternoon — a 1.0 magnitude quake
at 3:02 p.m., a 1.8 magnitude quake at 3:09 p.m. and a 2.2
magnitude quake at 4:50 p.m — and a 3.8 magnitude earthquake that
hit at 8:16 p.m. that evening.
According to the agency, no earthquake was centered in Berkeley on
Friday. Just after midnight Saturday morning, a 2.8 magnitude
earthquake shook the East Bay and was followed by two more smaller
quakes within the hour that were also centered in Berkeley.
Although their epicenters were not in Berkeley, at least four
earthquakes in the Bay Area and in Northern California were felt
in Berkeley between Thursday and Saturday, according to U.S.G.S.’s
response system that allows people to report if they feel a quake.
The Hayward Fault, from which all the earthquakes erupted this
week, runs through the UC Berkeley campus and under Memorial
Stadium.
The agency reported in 2008 that an earthquake of 6.8 magnitude or
greater at the Hayward Fault is increasingly likely since the last
major earthquake was 140 years ago and the past five earthquakes
of similar magnitudes have been, on average, 140 years apart.
The most recent large earthquake on the Hayward Fault was in 1868
— an approximately 6.8 magnitude quake that saw the earth crack
for 20 miles and killed 30 people, according to U.S.G.S.
If the 1868 earthquake were to reoccur today, the loss to
residential and commercial property could exceed $165 billion,
according to the 2008 report. The report also states that a major
earthquake on the fault would affect more than 5 million people.
Soumya Karlamangla is the assistant city news editor.