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.

Drawing of the Earth's mantle around the subducting Cocos plate

A Shock Without Aftershocks

When the blogger called the big magnitude 8.1 earthquake, which occurred off the coast of southern Mexico on September 8th, a rare event, he couldn't have known that our neighbor to the south would be shaken by an even stranger temblor 12 days later...

Plate Tectonics: Episode One

Why does our planet look different today? Find out why on the Berkeley Seismology Lab's Seismo Vlog...

Nate Lindsey wins Geo-CVD Travel Grant

BSL grad student Nate Lindsey met with Rep. Eric Swallwell during SSA's Geosciences Congressional Visits Day

A Rare Quake Made Even Rarer

The big earthquake that struck the Pacific coast of southern Mexico and northern Guatemala on Thursday night was the strongest temblor on our planet in two years. Its magnitude of 8.1 made it one of the rare, extremely powerful quakes which happen on average not more than once a year...

North Korea's Most Powerful Bomb

When North Korea detonated a nuclear device on Saturday night (California time) in its sixth underground nuclear test in more than a decade, one thing became very clear very quickly. This was the most energetic bomb which the Democratic People's Republic of Korea, North Korea’s official name, had ever test fired...

Today in Earthquake History: Assam 1950

It was August 15, 1950. People all over India were ready to celebrate their Independence Day, three years after Britain had released the subcontinent from its Empire. Even in the most remote northeastern corner of this vast country, in the widely tribal Assam Valley and the majestic mountains surrounding it, preparations for the festivities were underway. But at the end of the day, nobody in this border region where India, China, Pakistan, and Burma meet was in any mood to celebrate...