SAN DIEGO (FOX 5/KUSI) — A series of aftershocks in eastern San Diego County followed a 5.2 magnitude earthquake that rattled much of San Diego and Southern California Monday morning.
It all began with a 3.5 magnitude foreshock that hit just 3 miles south of Julian Sunday afternoon, USGS reported.
Then, at 10:08 a.m. Monday, a 5.2 magnitude earthquake hit around two miles south of Julian. Much of Southern California felt the quake.
Residents from Tijuana just across the U.S.-Mexico border all the way north to Los Angeles and all throughout San Diego County reported weak to strong shaking, the USGS shake map shows.
A series of at least eight aftershocks shook the region in the two hours immediately after, with some stronger than magnitude 3.0.
The aftershocks began at 10:10 a.m. with one measuring 2.9 magnitude, then another 2.9 at the same time.
At 10:11 a.m., a 2.7 magnitude aftershock hit, followed by a 2.6 at 10:12 a.m., all 3 to 5 km south of Julian, according to USGS.
Also at 10:12, the USGS registered a 3.5 magnitude aftershock 4 miles from Borrego Springs, east of Julian.
At 10:13 a.m., a 3.0 magnitude aftershock hit 4 km south of Julian, and a 2.5 magnitude hit the same area at 10:14 a.m.
A 3.9 magnitude aftershock hit near Julian at 11:23 a.m.
Series of aftershocks felt after 5.2 magnitude earthquake rattles San Diego (Photo: United States Geological Survey)
USGS says aftershocks are a sequence of earthquakes that happen after a larger mainshock on a fault and are a natural part of the Earth’s readjustment process after a major earthquake.
Aftershocks become less frequent with time, but USGS reports they can continue for days, weeks, months, or even years for a very large mainshock.
Alert San Diego is alerting residents that aftershocks are possible and advises it is best to stay indoors and away from unstable structures. If shaking starts — drop, cover, and hold on.
There are no reports of any injuries or major damage from the earthquake or aftershocks at this time, the San Diego County Sheriff’s Office reports.
The National Weather Service said a tsunami was not expected along the California coast.
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