A light, 4.7-magnitude earthquake struck in Northern California on Wednesday ... U.S.G.S. scientists to update the shake-severity map. Aftershocks can occur days, weeks or even years after ...

A 3.5-magnitude earthquake near Concord in the East Bay shook the area on Sunday, two days after a quake of similar magnitude ...

An earthquake with a preliminary magnitude of 3.7 struck in the Concord area on Sunday morning, according to the U.S.

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An earthquake with a preliminary magnitude of 3.7 shook San Francisco on Friday morning, the U.S. Geological Survey said. The ...

As wind and fire conditions change rapidly, zoom in and out on the interactive map below to see where air quality is worst around Southern California. You can also open the map in a new window here.