Testing seismometers.

The Berkeley Seismological Laboratory conducts essential research on earthquakes and solid earth processes while collecting and delivering high quality geophysical data.

We provide robust and real-time earthquake and hazard information on Northern California earthquakes, in collaboration with our partners.

We enable the broad consumption of earthquake information by the general public while educating and training students at all levels.

Map showing earthquakes and faults at the Mendocino Triple Junction

Our Research: Complicated Creep Where Three Plates Meet

Aseismic creep, movement of the ground along a fault in the absence of earthquakes, is an important characteristic of faults. To get at the aseismic creep rates in the Mendocino Triple Junction, Kathryn Materna and colleagues analyzed so-called repeating earthquakes - earthquakes that occur when the same patch of ground fails over and over again....

Google Earth image showing location of station ORV

Oroville Dam Makes its own Earthquakes

The immediate danger to the highest dam in the United States, the Oroville Dam, is over - at least for now. While more than 180,000 people who had been evacuated along the Feather River downstream from the dam were able to return home earlier this week, the future of the 770 foot high earthen dam in California's Butte County is all but secure...

Cross sectional diagram of San Fernando Valley faults

Today in Earthquake History: San Fernando 1971

Forty-six years ago today, the possibility of such a sudden dam burst was the hair-raising fear, in the chaos and devastation following the magnitude 6.7 earthquake that struck the San Fernando Valley north of Los Angeles...

Map of Cape Mendocino quakes

Temblors where Three Plates Meet

We have often said in this blog that California's most seismically active region lies around Cape Mendocino, halfway between San Francisco and the Oregon border. Thursday morning's off-shore temblor with a magnitude of 6.5 was a reminder of the seismic hazard in this region...