The quakes of magnitude 3.6, 2.5 and 2.9 had epicenters 3 to 4 miles northwest of the San Francisco Zoo, according to the U.S. Geological Survey.
The quakes of magnitude 3.6, 2.5 and 2.9 had epicenters 3 to 4 miles northwest of the San Francisco Zoo, according to the U.S. Geological Survey.
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