Friday, March 28, 2014

5.1 Earthquake Strikes Los Angeles

A shallow Mag 5.1 Quake has struck Los Angeles. Many aftershocks are being recorded. This is along a split off of the San Andreas, but is not the San Andreas fault. I will update this blog as news develops.

ABCNEWS Reports:

"The U.S. Geological Survey said the quake struck at about 9:09 p.m. and was centered near Brea in Orange County — about 20 miles southeast of downtown Los Angeles. It was felt as far south as San Diego and as far north as Ventura County, according to citizen responses collected online by the USGS.

Broken glass, gas leaks, a water main break and a rockslide were reported near the epicenter, according to Twitter updates from local authorities."

Screenshots from Google Earth with USGS shakemap overlay. Not the color scale and shake strength.

Some residents have reported major shaking, and some minor damage, mostly form objects falling off of shelves. Some infrastructure damage was reported, and more damage will likely be reported later as it becomes apparent. The quake was felt by guests at Disneyland who were riding rollercoasters. Park operations were not affected.

California is well-prepared for earthquakes, however some older structures are still vulnerable. Many buildings have suffered minor structural damage. Emergency personnel are responding.

The main quake was preceded by other smaller quakes, and more, and perhaps even larger quakes are possible. Residents should remain vigilant and prepared for this event for the next several days. Los Angeles has many fault lines that cris-cross through the city, many are still being discovered that have not activated in historical or colonial time (according to records).

In my home in San Diego, we did not feel any shaking.

California's last major quake near an urban center was the 7.2 magnitude quake centered near Mexicali, which was felt as far away as the upper midwest. The current quake series did not occur along this fault. 

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