San Diego, California (CNN) -- A moderate earthquake followed by dozens of smaller ones rattled Southern California Monday evening, just north of the Mexican border, the U.S. Geological Survey reported. The magnitude 5.7 quake struck at 9:26 p.m. local time and was centered 70 miles east of San Diego. "Since the 5.7 occurred, we've had another larger series of aftershocks occurring," said geophysicist Amy Vaughan of the USGS in Golden, Colorado. "We've had about 40 occurring since that with the largest being about a 4.5." CNN affiliate KSWB: Earthquake interrupts MLB game The main jolt and subsequent aftershocks have been felt across a large area in the region, Vaughan said.
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Earthquakes felt over Southern California, Arizona and Baja California
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Largest quake was a moderate 5.7 in magnitude
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No damage reported
"We've had over 12,000 'felt reports' coming in from most of @placeholder, parts of Arizona and parts of Baja California," Vaughan said.