SOLEDAD (CBS/AP) — An earthquake measuring 4.2 on the Richter scale has struck a wilderness area of Central California.

The U.S. Geological Survey reported that the temblor hit at 9:25 p.m. Sunday with its epicenter located five miles northwest of Pinnacles and 13 miles northeast of Soledad.

The Pinnacles National Monument is a vast wilderness area containing a rock formation left by an extinct volcano. The San Andreas fault runs through the region and seismic activity is frequent.

There were no immediate reports of injury or damage.

Smaller quakes earlier Sunday shook parts of Los Angeles and Riverside counties.

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