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A 3.4-magnitude earthquake in California.

Image Credit: EMSC

Nearly an hour ago a 3.4-magnitude earthquake struck 2.9 miles south of Walnut Creek, Contra Costa County, California, USA at a shallow depth of 9.9km.

The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.

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