Questions and answers about cause, aftershocks of magnitude-6.0 Northern California quake

  • by: TERRY TANG , Associated Press
  • Updated: August 24, 2014 - 4:25 PM

A magnitude-6.0 earthquake struck the San Francisco Bay Area early Sunday. Scientists say it was the largest earthquake to hit the region in 25 years. The quake struck at 3:20 a.m. about 6 miles from the city of Napa and reportedly lasted between 10 and 20 seconds. Here is a look at some of the basic questions about the science behind the quake that has shaken so many in California.

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