Swarm of More than 100 Earthquakes Rattles Southern California's Imperial County
USGS said the swarm included more than 150 quakes, and officials reported no injuries or significant damage.
- On Saturday, May 9, 2026, a swarm of over 150 earthquakes rattled Brawley, California, in Imperial County, with the United States Geological Survey recording the largest temblor at magnitude 4.5.
- The Brawley Fault Zone, an offshoot connected to the Imperial Fault Zone and the San Andreas Fault, is described by the Southern California Earthquake Data Center as "prone to earthquake swarms."
- Seismic activity began Saturday at 4:14 p.m. with a 3.5-magnitude quake, followed by at least 29 quakes measuring over 2.5 magnitude before the primary 4.5-magnitude event struck at 8:39 p.m.
- The city of Brawley activated its Emergency Operations Center to monitor conditions, reporting no significant damage while encouraging residents to remain alert as aftershocks could continue.
- Seismologist Dr. Lucy Jones noted that additional earthquakes are likely given the region's nature, while Cal OES continues coordinating with local partners to assess ongoing developments.
17 Articles
17 Articles
San Diego free from damage after Imperial Valley quake 'swarm'
No damage was reported in San Diego County after a “seismic swarm” of earthquakes rocked neighboring Imperial Valley this weekend. More than 360 minor earthquakes were reported in and around the Imperial County city of Brawley between the Salton Sea and the Mexican Border beginning at around 4 a.m. Saturday and continuing until late afternoon Sunday, according to the U.S. Geological Survey. The strongest one, registering at magnitude-4.7 shortly…
A seismic swarm caused 344 tremors in the city of Brawley, in Imperial County, with no reports of injuries; the strongest earthquake had a magnitude 4.7
The spokesman-Review
Earthquake swarm shakes Imperial County with 4.7 magnitude quake reported
A swarm of earthquakes shook Imperial County this weekend, with dozens of quakes, ranging in magnitude from 2.5 to 4.7, rattling the region around Brawley, California, south of the Salton Sea. The most intense earthquake reached a magnitude of 4.7 shortly after midnight in the early morning Sunday, according to the United States Geological Survey. The quakes continued through the morning, with ...
Swarm of more than 100 earthquakes rattles Southern California's Imperial County
A swarm of more than one hundred earthquakes rattled Southern California's Imperial County on Saturday, with the largest reported temblor registering at a magnitude of 4.5, according to the United States Geological Survey.
Coverage Details
Bias Distribution
- 71% of the sources are Center
Factuality
To view factuality data please Upgrade to Premium
