Earthquakes rattle San Jose — but not the big one


Two earthquakes more than three hours apart rattled the San Jose area of California late Tuesday, but no damage was reported, authorities said.

The U.S. Geological Service said a magnitude-3.1 quake struck at 7:19 p.m. local time a few miles east of San Martin. A stronger quake, registering 3.9. and centered northeast of Alum Rock, rolled through the area at 10:32 p.m., USGS said.

“A good shaker,” Sanjay Khandelwal, of Los Gatos, told The Mercury News. “My daughter felt it as well. She sleeps in a bunk bed and felt it move.”

Christiane Hinsch, in nearby Morgan Hill, posted on the CBS San Francisco Facebook page that she “heard it before it happened. Lasted about 5 seconds, windows vibrating.”

The quakes were triggered by the Calaveras Fault that runs east of San Jose. University of California-Berkeley seismologists have warned that the fault is connected to the Hayward Fault and that if they rupture together a destructive quake could result.

In 2015, the U.S. Geological Survey estimated a 14.3% likelihood of a magnitude-6.7 or greater earthquake on the Hayward Fault in the next 30 years, and a 7.4% chance on the Calaveras Fault. Given that the faults are connected, the energy released in a simultaneous rupture could be 2.5 times greater, or a magnitude-7.3 quake, the Berkeley seismologists have reported.




Credits:USATODAY

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