A pair of minor-to-moderate offshore earthquakes struck the northern California coast Sunday.
There are no reports of any damage or injury.
The U.S. Geological Survey says in a revised preliminary report that the first quake had a magnitude of 5.1 and struck at 2:27 a.m. Sunday at a depth of about 11 miles.
It was centered some 41 miles southwest of Eureka and 208 miles northwest of Sacramento.
The second was a magnitude-4.1 quake that struck one minute later 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 have received no word of injuries or damage.
Those shakers followed three small earthquakes that struck in Santa Clara County on Saturday, according to the U.S. Geological Survey.
The most recent temblor struck at 11:40 p.m. and had a preliminary magnitude of 2.3 with an epicenter about 6 miles northeast of San Jose, according to USGS.
USGS did not report the depth of the epicenter.
Two earthquakes earlier Saturday morning struck 10 miles north of Morgan Hill and 15 miles east-southeast of San Jose.
The first earthquake, with a 2.9 magnitude, struck at about 5 a.m., with an epicenter 4.2 miles deep.
The second one struck at about 6:25 a.m., had a preliminary magnitude of 2.0. and had an epicenter about 4 miles deep.