The  6.3 earthquake that struck Friday morning in the ocean west of Santa Catalina Island was most intense in Baja California and parts of San Diego County, according to the U.S. Geological Survey.

The epicenter was 163 miles from Avalon, 167 miles from Rosarito, Mexico, and 171 miles from Imperial Beach in San Diego County, according to the USGS.

A USGS intensity map shows reports of the quake were mostly centered in San Diego County and parts of Mexico. It was not largely felt in the L.A. area.

There were no reports of injuries or damage from the 2:36 a.m. quake, officials said. It occurred at a depth of seven miles

In a statement, the USGS said the quake "is not associated with that fault system. Instead, this earthquake represents intraplate faulting along northeast-southwest trending normal faults within the crust of the Pacific plate, just to the west of California’s continental shelf. The causative fault is not known at this time."

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Map: USGS