A 4.0 earthquake was felt throughout San Francisco on Monday morning. The U.S. Geological Survey says the earthquake struck a mile north of Piedmont, California, at 6:49 a.m, 3.3 miles below the earth’s surface. The USGS initially reported the earthquake’s magnitude as a 4.2, later adjusting it to a 4.0. The Piedmont Police Department said they have not received any reports of damage as of now. Bay Area Rapid Transit briefly delayed trains to check possible damage to the tracks. Officials say the BART has resumed service but but commuters should expect delays this morning.
Oakland police Lt. Chris Bolton said on Twitter,
“Although many calls continue, no reports of damage or injury in #Oakland.”
Geologists say the quake occurred along the Hayward fault and are well aware of the fault’s potential threat for a devastating quake. The Hayward fault lies directly below heavily populated areas throughout the East Bay.
As of now, the U.S. Geological Survey has reported six aftershock quakes near Piedmont that were all under a 2.5 magnitude.
Video below shows KTVU weatherman’s reaction to this morning’s earthquake live on the air.
— USGS (@USGS) August 17, 2015
— SFGate (@SFGate) August 17, 2015