Earthquakes

The four Loma Prieta Earthquake Professional Papers, which were published as multiple chapters, comprehensively document the magnitude 6.9 earthquake in California that shook the San Francisco and Monterey Bay regions on October 17, 1989. They contain almost 3000 pages written by 401 investigators of the earthquake. The investigations were funded by a special Congressional appropriation to the U.S...

Information to help you plan your visit to the Earthquake Science Center.

A list of technical questions & answers about earthquake hazards.

What is earthquake hazard? Earthquake ground shaking varies from place to place and the hazard mapping in this project will show this variability. The mapped hazard refers to an estimate of the probability of exceeding a certain amount of ground shaking, or ground motion, in 50 years. The hazard depends on the magnitudes and locations of likely earthquakes, how often they occur, and the properties...

The Last "Big One" in Southern California.

On August 23, 2011 tens of millions of people along the East Coast suddenly felt the earth shaking from the largest earthquake in the eastern U.S. since the M5.8 earthquake in 1944 near Cornwall and Massena, New York.

- last updated September 27, 2017 1:40 PST

Mon Mar 5, 7:30pm PT The earthquake swarm near Danville had continued to taper off over the past week. Since Feb 23 there have only been two earthquakes in the sequence larger than magnitude 2.0, a magnitude 2.0 on Feb 27 and a magnitude 2.5 on Mar 1. The most likely scenario looking forward is for this sequence to continue to taper off.