Earthquake Hazards

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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.

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Latest Earthquakes

Latest Earthquakes

Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Tap/click on "gear icon" for options and settings.

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Geologic Cracks Record Earthquakes on Reelfoot Fault in Central U.S.

Geologic Cracks Record Earthquakes on Reelfoot Fault in Central U.S.

New high-resolution lidar data reveals cracks produced from strong shaking in past earthquakes iin the New Madrid seismic zone.

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Latest and historical earthquakes, hazards information, educational resources, maps, seismographic stations and real-time recording, current research in plain language, data, software and derived products.

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News

Date published: May 17, 2019

MEDIA ADVISORY: Low-Level Flights in Charleston to Image Buried Faults and Ancient Lava Flows

Editor: ?In the public interest and in accordance with Federal Aviation Administration regulations, the USGS is announcing this low-level airborne project. ?Your assistance in informing the local communities is appreciated.

Date published: April 30, 2019

Study of Alaskan Landslide Could Improve Tsunami Modeling

A rare submarine landslide provides researchers with a reference point for modeling the biggest tsunamis. (EOS article)

Date published: March 25, 2019

USGS Seeks Earthquake Hazards Research Proposals

Applications due May 29, 2019

Publications

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Year Published: 2019

Radiometric ages of volcanic rocks on the fort rock dome and in the aquarius mountains, Yavapai and Mohave Counties, Arizona

The Fort Rock dome, in Yavapai County, Ariz., is a roughly circular geologic structure in plan view, 2.5 km in diameter, that is similar in many ways to an impact crater; however, it is a structural dome caused by a potassic mafic intrusion at depth, and the crater-like depression in its center is erosional in origin. The Aquarius Mountains, west...

Fuis, Gary S.; Calvert, Andrew T.; Sullivan, Katie
Fuis, G.S., Calvert, A., and Sullivan, K., 2019, Radiometric ages of volcanic rocks on the Fort Rock dome and in the Aquarius Mountains, Yavapai and Mohave counties, Arizona: U.S. Geological Survey Open-File Report 2019–1038, 18 p., https://doi.org/10.3133/ofr20191038.

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Year Published: 2019

Evaluation of ground motion models for USGS seismic hazard forecasts: Induced and tectonic earthquakes in the Central and Eastern U.S.

Ground motion model (GMM) selection and weighting introduces a significant source of uncertainty in United States Geological Survey (USGS) seismic hazard models. The increase in moderate moment magnitude induced earthquakes (Mw 4 to 5.8) in Oklahoma and Kansas since 2009, due to increased wastewater injection related to oil and gas production (...

McNamara, Daniel E.; Petersen, Mark D.; Thompson, Eric M.; Powers, Peter M.; Shumway, Allison; Hoover, Susan M.; Moschetti, Morgan P.; Wolin, Emily

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Year Published: 2019

Stratigraphic and structural relations in trench exposures and geomorphology at the Big Burn, Lily Lake, and Lester Ranch sites, Bear River Fault Zone, Utah and Wyoming

This report provides trench photomosaics, logs and related site information, age data, and earthquake event evidence from three paleoseismic trench sites on the Bear River Fault Zone. Our motivation for studying the Bear River Fault Zone—a nascent normal fault in the Rocky Mountains east of the Basin and Range physiographic province—is twofold: (1...

Hecker, Suzanne; Duross, Christopher; Schwartz, David P.; Cinti, Francesca R.; Civico, Riccardo; Lund, William R.; Hiscock, Adam I.; West, Michael W.; Wilcox, Tarka; Stoller, Alivia R.
Hecker, S., DuRoss, C.B., Schwartz, D.P., Cinti, F.R., Civico, R., Lund, W.R., Hiscock, A.I., West, M.W., Wilcox, T., and Stoller, A.R., 2019, Stratigraphic and structural relations in trench exposures and geomorphology at the Big Burn, Lily Lake, and Lester Ranch sites, Bear River Fault Zone, Utah and Wyoming: U.S. Geological Survey Scientific Investigations Map 3430, 8 p., 3 sheets, https://doi.org/10.3133/sim3430.

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