Some Southern Californians were awakened by shaking from a magnitude-3.4 earthquake early Tuesday centered in southwestern San Bernardino County.
The pre-dawn quake was centered near Rancho Cucamonga and Ontario at about 3:30 a.m. It was 4.3 miles deep.
There are no reports of damage or injuries.
Shaking was reported in San Bernardino and Riverside counties, La Verne, Rialto, Glendora, Orange, Fullerton, Anaheim and elsewhere.
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About 25 miles to the northwest, another early morning earthquake rattled the mountain community of Alpine Village. The magnitude 3.3 earthquake was recorded at about 5 a.m. at a depth of 7.4 miles.
The earthquake was 18.4 miles southwest of La Quinta, 19.4 miles south southwest of Palm Desert and 19.7 miles south southwest of Rancho Mirage.
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No damage or injuries were reported.
About 200 earthquakes in the magnitude-3.0 to 4.0 range are recorded in California every year. They're often felt, but rarely cause damage.