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Sunday’s 6.0 magnitude earthquake in Napa, California, was a jolt from the blue, involving previously unknown active fault lines as well as faults that were thought to be inactive. The quake caused widespread damage that may total several billion dollars, and scientists say it revealed new movement in 1.6 million-year-old faults.

“Scientists Scramble To Map Previously Unknown Fault That Caused Napa Quake” is categorized as “world”. This video was licensed from Grab Networks. For additional video content, click the “video” tab at the top of this page.