A San Jose-area earthquake with a magnitude of 3.9 struck Tuesday night, the second report of a tremor in that area of California that evening, SFGate.com reported. The Los Angeles Times put the magnitude at 4.0.
There were no initial reports of injuries or damage in either earthquake in Santa Clara County. The earthquake struck near Alum Rock at 10:32 p.m. Pacific time at a depth of 5.6 miles, according to SF Gate and the U.S. Geological Survey.
At 7:19 p.m. Pacific time, a magnitude 3.1 earthquake struck near San Martin at a depth of 4.3 miles, SFGate.com reported.
The San Jose Mercury News said earthquakes in the area were the latest in a series of erratic tremors triggered by the Calaveras Fault, which releases stress caused from the shifting continental plates.
The newspaper stated that geologists believe that the Calaveras and Hayward faults are linked, meaning that both could someday rupture together, resulting in significantly more destructive earthquake.
Some on social media took a ho-hum approach to the earthquake while others looked humorously at the twin tremors.
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