A magnitude 4.1 earthquake struck rural Kern County in Southern California on Monday afternoon, June 1, 2026, according to the U.
S. Geological Survey.
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The main tremor occurred at 3:34 p. m.
Pacific Time, with an epicenter about 11 miles west-southwest of Johannesburg.
The California Integrated Seismic Network recorded the quake at magnitude 4.06 using data from 113 seismic stations and 110 seismic phases.
Scientists determined the earthquake's depth between 3.9 and 4.7 miles. The U.
S. Geological Survey estimated location uncertainty at 0.2 kilometers and depth uncertainty at 0.7 kilometers.
Two aftershocks followed the main event. A magnitude 2.6 quake hit at 3:56 p.
m. , and a magnitude 2.7 tremor occurred at 4:41 p.
m.
Residents reported feeling shaking across a wide area, including Wofford Heights and Canyon Country. No injuries or significant property damage were immediately reported.
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Northern California Also Shaken
In a separate event, a preliminary magnitude 2.2 earthquake shook Sonoma County in Northern California at 5:01 p.
m. Monday.
The tremor occurred at a shallow depth of 0.02 miles, with the epicenter about 1 mile north of The Geysers.
That area experienced a magnitude 2.6 quake on May 31.
Emergency officials urge immediate protective actions during seismic activity. They advise people to drop, cover, and hold on to secure themselves from falling hazards.
“Wherever you are, drop down to your hands and knees and hold onto something sturdy,” officials stated.
Those using wheelchairs or walkers with seats should lock their wheels and remain seated until shaking stops.
Officials warned of post-earthquake hazards, including building damage, leaking gas and water lines, or downed power lines.
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They also advised expecting aftershocks and being ready to drop, cover, and hold on again.
