According to Yahoo.com, a 6.0 magnitude earthquake woke up Northern California about 3:45 AM local time, with the center approximately around the San Francisco Bay area, the U.S. Geological Survey said.

This morning's quake is the largest to rock the area since 1989.

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Yahoo.com reports-

"The USGS says the depth of the earthquake was just less than seven miles, and numerous small aftershocks have occurred in the Napa wine country.

"A quake of that size in a populated area is of course widely felt throughout that region," said Randy Baldwin, a geophysicist with the U.S. Geological Survey in Golden, Colorado, "The 6.0 is a sizeable quake for this area. It's a shallow quake. It's about 6 miles deep. We received hundreds of reports on our website from people that felt it in the surrounding area."

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According to USA Today-

The Sonoma County Sheriff's Office reports power outages in the city of Sonoma and surrounding areas, but a spokeswoman says they are not anticipating major damage.

At the time of publishing no injuries have been reported but widespread damage and spotty fires throughout the area have been reported.

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[Update, 10:00 AM CST] According to CNN, close to 100 injuries have been reported, most minor, with a few severe.

(source USA Today and Yahoo.com)