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.

 

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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Earthquake Notification Service (ENS)

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Science for Everyone

Science for Everyone

What if the ShakeAlert Earthquake Early Warning System Had Been Operating During the M6.9 1989 Loma Prieta Earthquake?

How will ShakeAlert® likely perform now on a large earthquake impacting a major urban area? How much warning will you get?

Read Article

Remembering Loma Prieta

Leading up to the quake’s 30th anniversary, we will be sharing stories from Loma Prieta, answering questions through our Public Lecture series, sharing products developed since the quake, and more. Check back here for more information.

Video: Where were you the night the Loma Prieta earthquake hit?

Video: What were you thinking when the Loma Prieta earthquake struck?

Video: What lessons have we learned since the Loma Prieta earthquake?

Video: Are we safer today then we were 30 years ago?

Learn More

News

Date published: December 11, 2019

USGS provides update for the National Seismic Hazard Model

USGS experts recently released a study that incorporates the latest earthquake science findings into an update of the National Seismic Hazard Model for the “lower-48” United States.  Read the full report here:  https://journals.sagepub.com/doi/full/10.1177/8755293019878199

Date published: December 9, 2019

In the Field with Kate Scharer

What’s a day in the life of a research geologist like?

Date published: November 21, 2019

Extending Rupture History in Grand Tetons National Park (SSA News Release)

"19 November 2019–Hand-dug trenches around Leigh Lake in Grand Teton National Park in Wyoming reveal evidence for a previously unknown surface-faulting earthquake in along the Teton Fault—one occurring about 10,000 years ago." A Seismological Society of America news release covers recent research published by USGS scientists and cooperators.

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Publications

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Year Published: 2019

3D geologic framework for use with the U.S. Geological Survey National Crustal Model, Phase 1—Western United States

A 3D geologic framework is presented here as part of the U.S. Geological Survey National Crustal Model for the western United States, which will be used to improve seismic hazard assessment. The framework is based on 1:250,000 to 1:1,000,000-scale state geologic maps and depths of multiple subsurface unit boundaries. The geology at or near the...

Boyd, Oliver S.
This publication is available at https://pubs.er.usgs.gov/publication/ofr20191081. After the Digital Object Identifier (DOI) and product metadata have been registered by CrossRef, the official URL will be https://doi.org/10.3133/ofr20191081.

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Year Published: 2019

The LArge-n Seismic Survey in Oklahoma (LASSO) experiment

In 2016, the U.S. Geological Survey deployed more than 1,800 vertical-component nodal seismometers in Grant County, Oklahoma to study induced seismic activity associated with production of the Mississippi Limestone Play. The LArge-n Seismic Survey in Oklahoma (LASSO) array operated for approximately one month, covering a 25-km-by-32-km region with...

Dougherty, S.; Cochran, Elizabeth S.; Harrington, R. M.
Dougherty, S.L., Cochran, E.S., and Harrington, R.M. (2019). The LArge-n Seismic Survey in Oklahoma (LASSO) Experiment, Seismological Research Letters, 90 (5): 2051-2057, doi:10.1785/0220190094.

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Year Published: 2019

Status of three-dimensional geological mapping and modeling activities in the U.S. Geological Survey

The U.S. Geological Survey (USGS), created in 1879, is the national geological survey for the United States and the sole science agency within its cabinet-level bureau, the Department of the Interior. The USGS has a broad mission, including: serving the Nation by providing reliable scientific information to describe and understand the Earth;...

Sweetkind, Donald; Graymer, Russell; Higley, D.K.; Boyd, Oliver S.