The U.S. Geological Survey is releasing a 3D computer model of the upper 20 miles of the earth’s crust in the greater San Francisco Bay Area that will enable researchers to recreate the shaking levels ...

Among seismologists, the geology of Alaska's earthquake- and volcano-rich coast from the Aleutian Islands to the southeast is fascinating, but not well understood. Now, with more sophisticated tools ...

Velocity is a fundamental property of rocks that depends on density and elastic moduli. It varies laterally as well as vertically due to the physical-geologic variations of rocks. Velocities are ...

This CyberShake Study 22.12 seismic hazard model shows the Southern California regions, depicted in reds and yellows, expected to experience strong ground motions at least once in the next 2,500 years ...

One of Alaska’s most active volcanoes has been erupting since May 2021, but the location of intense seismic activity has moved around during that time. Scientists have wondered why, and now, new ...

The critical role played by accurate seismic velocity measurements in imaging is well documented. Optimal summing of prestack time migrated (PSTM) data depends on accurate seismic velocity ...

As Utah prepares for an overdue, big earthquake, University of Utah seismologists found that current seismic hazard models may be underestimating the intensity of shaking the Salt Lake Valley could ...