A swarm of small earthquakes jolted San Ramon over the last month. Scientists said the earthquakes are normal and aren’t indicative of the big one.

A magnitude 4.0 earthquake Sunday afternoon three miles from Santa Rosa was followed a few minutes later by magnitude 3.1 and 3.4 temblors.

"People sometimes think the little earthquakes are a safety valve."

San Ramon was hit by more than 90 tremors in mid-November.

The earthquakes are not believed to be connected. But they are a reminder of lurking danger.

A rare, ultra-long earthquake in Myanmar revealed that mature faults can deliver their full force directly to the surface. The discovery could mean stronger shaking near faults like California’s San Andreas than current models predict.

California's seismic risk is increasing with supershear earthquakes, which are faster and more destructive than typical earthquakes.

The quake struck the country's north just days after a 7.5-magnitude earthquake in the same region injured 50 people.

Is it safe to travel to Japan after recent earthquakes? - Japan is asking those in affected areas to be on high alert for at least a week