A magnitude 4.1 earthquake rattled an inland region of San Diego County on Sunday morning, the U.S. Geological Survey confirmed.

The quake hit at 9:46 a.m. near Palomar Observatory, about 65 miles northeast of downtown San Diego, USGS said.

A dispatcher with the San Diego County Sheriff’s Department said shaking was felt at the Valley Center substation, but there were no immediate reports of damage or injury.

“There were 2 main jolts with a rapid shaking,” the National Weather Service office in San Diego said on Twitter.

Residents in San Diego County and to the north in Riverside, San Bernardino and Los Angeles counties reported shaking to the “Did You Feel It?” section of the USGS web site.

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