EUREKA, Calif.— A pair of minor-to-moderate offshore earthquakes have struck the northern California coast, but there are no reports of any damage or injury.

The U.S. Geological Survey says in a preliminary report that the first quake had a magnitude of 5.1. It struck at 2:27 a.m. Sunday about 41 miles southwest of Eureka and 208 miles northwest of Sacramento at a depth of 11.5 miles.

The second was a magnitude 4.1 quake that struck one minute later farther south, about 40 miles west of Santa Rosa and 74 miles northwest of San Francisco at a depth of about 3 miles.

Sheriff's dispatchers in the nearest affected counties of Humboldt and Sonoma say they've received no word of injuries or damage.