A magnitude 4.3 earthquake rumbled through Muscoy in San Bernardino County on Thursday morning, triggering shaking across the Inland Empire, Los Angeles and Orange counties, according to the U.S. Geological Survey.
The earthquake occurred at 9:32 a.m. at a depth of about 3.3 miles and was followed by a magnitude 3.1 aftershock three minutes later in Rialto, according to USGS.
There were no immediate reports of damage.
The Rialto Fire Department reported that a series of earthquakes ranging from 2.0 to 4.4 shook the northwest portion of the city Thursday morning.
“There’s no reportable damage but it’s still pretty early,” said Chris Jensen, the department’s interim fire chief. There haven’t been any medical calls related to the earthquake but Jensen said the agency will continue to monitor the situation.
Data shows the quake was felt over a wide swath of Southern California, from Los Angeles to San Diego and as far east as Ventura County. Residents who felt the earthquake closest to the epicenter and sent information to the USGS’s Did You Feel It? website reported experiencing the equivalent of Intensity 4 shaking on the Modified Mercalli Intensity Scale, which is light shaking too weak to cause any damage.
Areas further away from the epicenter, from Simi Valley to San Diego, reported Intensity 2 to Intensity 3 shaking, or weak shaking that wouldn’t cause damage.
In the past 10 days, there have been three earthquakes of magnitude 3.0 or greater centered nearby.
An average of 25 earthquakes with magnitudes between 4.0 and 5.0 occur per year in California and Nevada, according to a recent three year data sample.
The temblor comes days after a powerful earthquake struck off Russia’s sparsely populated east coast, sending waves slamming into buildings in Siberia and northeastern Japan. At magnitude 8.8, the earthquake ranks as the sixth-most powerful ever recorded.
Did you feel this earthquake? Consider reporting what you felt to the USGS.
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Quakebot contributed to this report
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