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Officials said the magnitude-5.3 earthquake that rattled Southern California on Thursday proved to be another successful test of the state's nascent earthquake early-warning system.
John Vidale, director of the Southern California Earthquake Center, said the system worked. He said he and others at the center at USC heard the alarm go off before they felt the shaking, "maybe 10 seconds ahead, enough for us to puzzle about it before the shaking hit."
"It was pretty widely felt across the USC campus. We only felt about 3 to 4 seconds, kind of a vibration, kind of long enough for it to sink in that it was an earthquake, before it stopped," Vidale said.
The U.S. Geological Survey website had thousands of reports of people feeling a magnitude-3.9 quake that struck at 9:39 a.m. Monday and was centered 9 miles (15 kilometers) northeast of San Jose.
The Geological Survey says a magnitude-3.8 temblor hit three minutes earlier 21 miles (34 kilometers) south of Bakersfield.
originally posted by: SeaWorthy
I doubt anyone will see anything in them shares anyhow, but my thoughts were what I said as I watched. They seemed to form in one spot the empty circle and just start streaming out the rest of the sky was blue and the clear spot in the middle out to sea.