The latest shaker struck at 9:07 a.m and was centered near Alcosta Boulevard and Canyon Hills Road, about 6 miles deep, the USGS reported.
Another 3.0 temblor shook the area at 5:21 a.m., and several smaller quakes have registered in the area on Monday, ranging from 1.6 to 2.7.
The quakes were located along the Calaveras Fault Zone.
Then, a preliminary 2.9 magnitude earthquake struck Piedmont at 2:55 p.m.
MORE: Magnitude 7.6 quake strikes off Japan's northern coast and triggers a tsunami alert
These come after a cluster of earthquakes in the last few weeks. In November, there were at least 8 small earthquakes near San Ramon, the largest being a 3.8 quake, USGS said.
ABC7's Drew Tuma said on "Midday Live," there have been at least 12 earthquakes in the San Ramon area since Sunday, according to the USGS.
There was no damage reported.
ABC7's Drew Tuma contributed to this report
MAP: Significant San Francisco Bay Area fault lines and strong earthquakes
Zoom in on the map below and compare where you live to the significant faults and where strong earthquakes have struck in the Bay Area.
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