A 4.8-magnitude earthquake struck El Centro in Imperial County simply after midnight and was adopted by a swarm of aftershocks, many over magnitude 3, the U.S. Geological Survey reported
The primary quake struck at 36 minutes after midnight about two miles north of downtown El Centro. Most of the aftershocks have been additionally centered inside the metropolis limits.
There have been no speedy reviews of damage or injury, however the quakes have been broadly felt in San Diego County.
Shaking continued into the morning, with a 2.7-magnitude quake simply after 7 a.m.
The swarm of quakes have been doubtless attributable to the San Jacinto fault system, probably the most energetic faults in Southern California.