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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

Fiber-optic sensing for earthquake hazards research, monitoring and early warning Fiber-optic sensing for earthquake hazards research, monitoring and early warning

The use of fiber‐optic sensing systems in seismology has exploded in the past decade. Despite an ever‐growing library of ground‐breaking studies, questions remain about the potential of fiber‐optic sensing technologies as tools for advancing if not revolutionizing earthquake‐hazards‐related research, monitoring, and early warning systems. A working group convened to explore these topics...
Authors
Jeffrey McGuire, Andrew Barbour, Zack Spica, Verónica Rodríguez Tribaldos, Zhongwen Zhan, Bradley Lipovsky, Robert Mellors, Ettore Biondi, Clara Yoon, Martin Karrenbach, Adam Ringler, James Atterholt, Avinash Nayak, Theresa Marie Sawi, Loic Viens, Eileen Martin, Allen Husker, Paul Bodin, Morgan Moschetti, Qibin Shi, Nathaniel Miller, Prisha Puri

Ultralong, supershear rupture of the 2025 Mw 7.7 Mandalay earthquake reveals unaccounted risk Ultralong, supershear rupture of the 2025 Mw 7.7 Mandalay earthquake reveals unaccounted risk

The 28 March 2025 moment magnitude (Mw) 7.7 earthquake in Mandalay, Burma (Myanmar), ruptured 475 kilometers of the Sagaing Fault, which was more than twice the length predicted by magnitude scaling relationships. Kinematic slip models and observation of a Rayleigh Mach wave that passed through parts of Thailand confirmed that rupture occurred at supershear velocities of greater than 5...
Authors
Dara Goldberg, William Yeck, Catherine Elise Hanagan, James Atterholt, Haiyang Kehoe, Nadine Reitman, William Barnhart, David Shelly, Alexandra Hatem, David Wald, Paul Earle

Earthquake magnitude and source parameter estimation with a distributed acoustic sensing dataset in the Gorda subduction zone Earthquake magnitude and source parameter estimation with a distributed acoustic sensing dataset in the Gorda subduction zone

Distributed acoustic sensing (DAS) systems offer a cost‐effective way to create large‐scale strainmeter arrays for seismological applications using fiber‐optic cables. DAS‐based strain measurements are known to be influenced by various factors, bringing into question their general reliability for accurate earthquake characterization. A 15‐km‐long DAS deployment in northern California was...
Authors
Andrew Barbour, Jeffrey McGuire, Martin Karrenbach, Robert McPherson, Mark Hemphill-Haley, Connie Stewart

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

ENS icon
ENS icon
ENS icon
seismic waves emanating from M8.8 Russia quake seismic waves emanating from M8.8 Russia quake
M 8.8 Kamchatka Peninsula Earthquake ShakeMovie
Did You Feel it? icon
Did You Feel It? icon
Did You Feel It? icon
Aftershock Forecast icon
Aftershock Forecast icon
Aftershock Forecast icon
Earthquake Scenarios icon
Earthquake Scenarios icon
Earthquake Scenarios icon
Ground Failure icon
Ground Failure icon
Ground Failure icon
Finite Fault icon
Finite fault icon
Finite fault icon
Moment Tensors icon
Moment tensor icon
Moment tensor icon
ShakeAlert icon
ShakeAlert icon
ShakeAlert icon
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