An earthquake swarm shook Imperial County, including a 4.7 magnitude quake near Brawley. No injuries were reported.
A sudden earthquake swarm shook Imperial County this weekend, sending dozens of temblors through the region around Brawley—an area south of the Salton Sea where many residents felt the ground move.
The largest reported quake reached magnitude 4.7 shortly after midnight on Sunday, according to the United States Geological Survey. The activity did not end there; additional tremors continued through the morning, including a magnitude 2.7 earthquake reported a little after 7 a.m.
USGS data indicated the swarm involved earthquakes ranging from about magnitude 2.5 up to 4.7. For many people, the effects were stronger than a brief jolt: the USGS said roughly 180,000 residents experienced light to strong shaking.
Local officials moved quickly to monitor conditions.. The city of Crowley activated its Emergency Operations Center. while also reporting that there were no reports of significant damage at the time the statement was issued.. In its message to residents, the city emphasized that community safety remains its top priority.
Crowley encouraged residents to conduct a walk-through of their property to check for possible damage—particularly from common earthquake-related hazards such as water or gas leaks.. Even when impacts appear limited, officials said, these inspections can help identify problems that may not be immediately visible.
The timeline of the event extended beyond the early-morning peak. The first quake in the sequence was reported at 4:14 p.m. Saturday, measuring magnitude 3.5. That initial tremor set the stage for the later, more intense activity.
Meanwhile. the California Office of Emergency Services said it was coordinating with local partners on Sunday morning and continuing efforts to assess developments.. The goal. the agency said. was to help keep Californians safe as information about the swarm and any potential impacts continues to evolve.
No injuries were reported following the earthquake swarm. but the episode underscored how quickly a cluster of quakes can affect a large number of people.. For communities near major earthquake zones. sustained seismic activity can be disruptive even without major structural damage—especially when aftershocks keep residents alert and require ongoing safety checks.
Imperial County earthquake Brawley quake 4.7 magnitude USGS shaking Emergency Operations Center California OES