The quake was measured at a depth of about 4 kilometers. The closer to the surface an earthquake starts, the more ground shaking and potential damage it will cause.
According to the U.S. Geological Survey, people typically report feeling earthquakes larger than about magnitude 2.5.
MAP: Significant San Francisco Bay Area fault lines and strong earthquakes
Zoom in on the map below and compare where you live to the significant faults and where strong earthquakes have struck in the Bay Area.
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