Small Quake Shakes Los Angeles County

September 25, 2011
losalamitos.patch.com

A small earthquake struck in Los Angeles County this morning that was felt as far away as Orange County.
The quake was 3.3 in magnitude and epicentered in Santa Clarita at 11:23 a.m. No major damage or injuries have been reported. Did you feel the earthquake?
To find out if you live on a fault line, click here.
According to the U.S. Geological Survey, there have been two earthquakes of late that Seal Beach and Rossmoor residents may have felt, including a 3.2 magnitude earthquake in August with an epicenter in Long Beach and a 3.8-quake in November with an epicenter just off the coast.
According to Seal Beach’s Emergency Operations Plan, the major threat from an earthquake is a process called liquefaction in which major shaking blends soil and water, destabilizing structures above.
The other earthquake concern for the area is the tsunami resulting from a quake. Any tsunami affecting Seal Beach would likely be caused by an earthquake very far away, such as the Alaskan 8.4 magnitude quake in 1964 that caused 5-foot tidal surges in Seal Beach. Today, the city has a reverse 911 system in place in to issue tsunami warnings. All phones in your household should and can be registered by signing up at OC Alert.