Earthquake Hazards
Earthquake Hazards
The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. Explore and search below.
Earthquake Information
Earthquake Information
Find recent or historic earthquakes, lists, information on selected significant earthquakes, earthquake resources by state, or find webservices.
Filter Total Items: 155
Alaska
Probabilistic seismic hazard maps have been prepared for Alaska portraying ground motion values (peak ground acceleration and spectral amplitude at periods of 0.2, 0.3 and 1.0 seconds) at probabilities of exceedance of 2% and 10% in 50 years. Preparation of these maps followed the same general strategy as that followed for the U.S.G.S. seismic hazard maps of the contiguous United States, combining...
U.S. Seismic Hazard Maps – Puerto Rico and the U.S. Virgin Islands, Samoa and the Pacific Islands, and Guam and Northern Mariana Islands
Seismic hazard maps for Puerto Rico and the U.S. Virgin Islands, Samoa and the Pacific Islands, and Guam.
Vs30 Models and Data
The following resources are available for Vs30 (the time-averaged shear-wave velocity to 30 m depth) models and data.
Foreign Hazard Maps
Hazard model studies for selected outside-the-U.S. locations.
Memphis Earthquake Hazard Mapping Project
Memphis has a dense urban population near faults capable of producing major earthquakes.
Central U.S. Seismic Velocity Model
Compared to what we know about earthquake hazards in California, less is known in the Central US.
Liquefaction Hazard Maps
Overview Liquefaction is a phenomenon that is caused by earthquake shaking. Wet sand can become liquid-like when strongly shaken. The liquefied sand may flow and the ground may move and crack, causing damage to surface structures and underground utilities.
2018 NSHM Update Workshop
March 7-8, 2018Newark, CARisk Management Solutions Headquarters The following links are to PDF versions of the workshop presentations. All workshop participants have granted permission to post their presentations. If you prefer, you can download all of the presentations in one Zip file (48.3 MB).
National Seismic Hazard Model Project Team
Staff and collaborators on the National Seismic Hazard Model Team
