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The fault has moved the curbs as much as a handspan, around 18 centimeters, since the time they were installed, up to 60 ...

The Concord Fault can produce earthquakes of 6.7 magnitude or higher, according to the U.S. Geological Survey. A magnitude 5.4 quake on the fault caused widespread damage across the Bay Area in 1955.

Earthquakes with magnitudes of 3.6, 3.2 and 2.6 have struck this morning in Concord. They all hit in same area where several small quakes occurred on Sunday, according to the U.S. Geological Survey.

One of the strongest earthquakes ever recorded struck off Russia's sparsely populated Far East early Wednesday, sending tsunami waves into Japan, Hawaii and the U.S. West Coast.