A small, magnitude 4.3 (revised downward from 4.4) earthquake struck the coast at 10:41 am this morning. It lasted for two or three seconds. The epicenter sixteen miles east-southeast of San Jose at a depth of just under four miles. It appeared to located near the intersection of the Hayward and Calaveras faults.
The USGS ranks this as a “light” earthquake with potential for light damage in the area immediately adjacent to the epicenter and with little or no damage farther away from the epicenter.
For more information see this USGS page.
Here is a plot from Google Maps showing the location of the epicenter.
Here is the plot from the USGS site: