Some residents in Long Beach and the north Orange County coast reported feeling and hearing what some thought was an earthquake Wednesday afternoon.
But Caltech seismologist Kate Hutton said no earthquakes were reported in the area during the time the shaking was reported.
“It’s not an earthquake. It’s probably an offshore sonic boom,” Hutton said.
Federal Aviation Administration spokesman Ian Gregor said any sonic boom would come from a military aircraft.
“Civil aircraft do not exceed the speed of sound, so any sonic boom would come from a military aircraft,” he said. “Military aircraft do not fly supersonically in civilian airspace; they would only do so in restricted military airspace out over the ocean.”
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SOURCE: The Los Angeles Times
Rong-Gong Lin II