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.
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Southern California Earthquake Hazards
Southern California has the highest level of earthquake risk in the United States, with half of the expected financial losses from earthquakes in the Nation expected to occur in southern California. Sitting astride the Pacific - North American plate boundary at the Big Bend of the San Andreas Fault, Southern California has over 300 faults capable of producing magnitude 6 and larger earthquakes...
M7.3 June 28, 1992 Landers Earthquake
“The Landers earthquake, which had a moment magnitude (Mw) of 7.3, was the largest earthquake to strike the contiguous United States in 40 years. This earthquake resulted from the rupture of five major and many minor right-lateral faults near the southern end of the eastern California shear zone.” —Kerry Sieh et al., Science, v 260, issue 5105, 171-176.
Requests for Seismic Hazard Modeling Contributions
The USGS periodically updates its National Seismic Hazard Models (NSHMs) for the United States and its territories. For each NSHM update, the USGS requests that the seismic hazard community bring to our attention new earthquake source and ground motion data or models that could be included. The deadlines for these community contributions, and the schedule for each NSHM update (including public...
Earthquake Early Warning - Overview
USGS is actively pursuing research in earthquake early warning.
Introduction to the National Seismic Hazard Models
A primary responsibility of the USGS National Seismic Hazard Model (NSHM) Project is to model the ground shaking hazard from potentially damaging earthquakes for the United States and its territories. The model results can be summarized with different map views and here, we describe the maps and important features (what they show and what they don't show).
Information for PIs
Information for PIs.
Thailand Seismic Hazard Workshop - 2007
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations.
Workshop on Hazard from Induced Seismicity
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations.
Pacific Northwest Workshop - 2006
The links in the following agenda are to PDF files of participants that have granted permission to view their presentations at the CEUS workshop.
Next Generation Attenuation (NGA) Relationships Workshop - 2006
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations.
Central and Eastern U.S. Workshop - 2006
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations.
Pacific Northwest Workshop - 2012
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations at the PacNW workshop.