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Earthquake Hazards Program

The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. We undertake these activities as part of the larger National Earthquake Hazards Reduction Program (NEHRP), a four-agency partnership established by Congress.

News

USGS releases aftershock forecast for M8.8 Russian Kamchatka Peninsula Earthquake

USGS releases aftershock forecast for M8.8 Russian Kamchatka Peninsula Earthquake

USGS Geologic Mapping Project Supports Critical Mineral Exploration, Enhances Public Safety in the Southeast

USGS Geologic Mapping Project Supports Critical Mineral Exploration, Enhances Public Safety in the Southeast

USGS Announces Recipients of Recent Earthquake Research Grants and Cooperative Agreements

USGS Announces Recipients of Recent Earthquake Research Grants and Cooperative Agreements

Publications

High frequency and region-scale simulations of large (Mw7+) earthquakes on the southern Whidbey Island fault, Washington, USA High frequency and region-scale simulations of large (Mw7+) earthquakes on the southern Whidbey Island fault, Washington, USA

We simulate ground shaking in western Washington State from hypothetical Mw7.0–7.5 earthquakes on the southern Whidbey Island fault (SWIF). Ground motions are modeled considering kinematic source distributions on a complex fault plane, a 3D seismic velocity model, and region‐specific soil velocity models. We run simulations with varying model resolutions, including regional‐scale...
Authors
Ian Stone, Erin Wirth, Alex Grant, Arthur Frankel

Memory and jamming in fault zone sediments Memory and jamming in fault zone sediments

Many subsurface processes involve transitions in granular material states, from arrested to creeping to flowing. Experiments and frameworks for idealized systems reveal that granular fabrics develop during shearing, co-evolve with applied stress, and govern such transitions. We use microtomography to test whether fabrics at two San Andreas fault sites reflect slip history and whether...
Authors
Jhardel Dasent, Vashan Wright, Katherine M. Scharer, Michael Manga, Richard Kilburn

Long‐period ground motions from dynamic rupture simulations of large earthquakes on the creeping Hayward–Calaveras–Rodgers Creek fault system Long‐period ground motions from dynamic rupture simulations of large earthquakes on the creeping Hayward–Calaveras–Rodgers Creek fault system

he Hayward, Calaveras, and Rodgers Creek faults in the San Francisco Bay region of California have a high probability of producing a large earthquake in the next decades. Although these faults creep, the creep is insufficient to keep up with their relatively rapid slip rates on their deepest sections, so they have been storing tectonic strain since their last large earthquakes, with the...
Authors
Ruth Harris, Michael Barall, Grace Parker, Evan Hirakawa

Science

Earthquake Sequence Product

The USGS earthquake sequence product is a tool that identifies and describes earthquakes that are clustered in space and time as “sequences.” Its overarching goal is to provide simple contextual information regarding the spatial and temporal interconnection of earthquakes. The sequence product provides a description of a sequence, including information on the number and size of aftershocks, as...
Earthquake Sequence Product

Earthquake Sequence Product

The USGS earthquake sequence product is a tool that identifies and describes earthquakes that are clustered in space and time as “sequences.” Its overarching goal is to provide simple contextual information regarding the spatial and temporal interconnection of earthquakes. The sequence product provides a description of a sequence, including information on the number and size of aftershocks, as...
Learn More

Engineering and Risk

The well-known statement "Earthquakes don't kill people, buildings do" highlights the need to make our communities more earthquake resilient. The impact of earthquakes on public safety and the national economy can be reduced through improvement of the built environment to resist earthquake effects such as ground shaking. Extending natural hazards science to risk involves (1) conducting research to...
Engineering and Risk

Engineering and Risk

The well-known statement "Earthquakes don't kill people, buildings do" highlights the need to make our communities more earthquake resilient. The impact of earthquakes on public safety and the national economy can be reduced through improvement of the built environment to resist earthquake effects such as ground shaking. Extending natural hazards science to risk involves (1) conducting research to...
Learn More
2025 Puerto Rico and U.S. Virgin Islands Long-term National Seismic Hazard Model

2025 Puerto Rico and U.S. Virgin Islands Long-term National Seismic Hazard Model

We anticipate the final 2025 PRVI NSHM to be available by December 21st 2025.
Learn More

Multimedia

10 Largest Earthquakes Ever Recorded
10 Largest Earthquakes Ever Recorded (Updated 2025)
10 Largest Earthquakes Ever Recorded (Updated 2025)
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seismic waves emanating from M8.8 Russia quake seismic waves emanating from M8.8 Russia quake
M 8.8 Kamchatka Peninsula Earthquake ShakeMovie
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Aftershock Forecast icon
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Ground Failure icon
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