AVENAL, Calif. — A small earthquake swarm struck central California overnight Saturday, with at least four minor earthquakes recorded northwest of Avenal, according to the U.S. Geological Survey.
The quakes, ranging in magnitude from 2.6 to 2.8, occurred within a roughly 12-hour window late Friday night into early Saturday. All were centered about 11 kilometers (7 miles) north-northwest of Avenal in Fresno County, an area known for frequent low-level seismic activity.
The strongest earthquakes, both measured at magnitude 2.8, struck shortly before 10 p.m. Friday and again early Saturday morning. The remaining events followed nearby, with depths between about 8 and 10 kilometers, placing them well below the surface but shallow enough to be felt locally by residents close to the epicenter.
No injuries or damage were reported, and early data showed no significant number of “Did You Feel It?” reports submitted by residents. Earthquakes of this size are typically felt only near their source and rarely cause damage.
According to the USGS, such small earthquake swarms are common in California, particularly in the Central Valley and along fault systems that branch off larger, well-known faults such as the San Andreas. The quakes were recorded by the California Integrated Seismic Network, which monitors seismic activity statewide.
Seismologists said small swarms like this do not necessarily indicate that a larger earthquake is imminent. However, they provide valuable data about stress changes along fault lines and help scientists better understand regional seismic behavior.
Officials reminded residents that earthquakes can occur at any time in California and encouraged people to review basic earthquake safety steps, including securing heavy furniture, knowing safe places to take cover, and having emergency supplies available.
The USGS continues to monitor the area for additional activity but said no further significant earthquakes were expected immediately.
