2.9 earthquake strikes off San Francisco coast followed by aftershocks minutes later, USGS says

SAN FRANCISCO -- An earthquake with a preliminary magnitude of 3.0 struck near the San Francisco Zoo at 4:39 p.m. Saturday, the U.S. Geological Survey said.

It was followed by aftershocks of 2.0 magnitude at 4:40 p.m. and 2.7 magnitude at 4:41 p.m., the USGS said.

All three quakes occurred two miles south-southwest of the zoo. The initial temblor was measured at a depth of 4.3 miles. The first aftershock was at 4.1miles deep; the second was at 4.3 miles.

The first quake has been downgraded to a 2.9.

The closer to the surface an earthquake starts, the more ground shaking and potential damage it will cause.

People typically report feeling earthquakes larger than about magnitude 2.5, according to the USGS.

No injuries or major damage have been reported.

Video in the media player above is from a previous update

KGO-TV contributed to this report

MAP: Significant San Francisco Bay Area fault lines and strong earthquakes
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