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). Check out the new interface! (7/27/20)

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Earthquake Notification Service (ENS)
ShakeAlert® Earthquake Early Warning

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Subscribe to Earthquake News

Subscribe to Earthquake News

Want to know when there is a new earthquake-related announcement or new content on the website? You can now subscribe to the Earthquake Hazards Program News RSS feed.

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The 2019 Ridgecrest, California, Earthquake Sequence Geonarrative

The 2019 Ridgecrest, California, Earthquake Sequence Geonarrative

Remember the M6.4 and M7.1 Ridgecrest, CA earthquakes back in July 2019? Now you can explore and interact with a presentation summarizing the USGS response and research findings that were recently published.

Explore

News

Date published: January 14, 2021

Federal Agencies Partner to Strengthen ShakeAlert Earthquake Early Warning Capacity Along the West Coast

A lone solar panel in the middle of California’s largest national forest is powering a seismometer able to detect Earth’s vibrations, a piece of the puzzle necessary to help protect life and property by providing critical seconds of warning that an earthquake is occurring and shaking is imminent.  

Date published: December 29, 2020

Magnitude 6.4 Earthquake in Croatia

The USGS has up-to-date details on the December 29, 2020 event.

Date published: December 9, 2020

Follow Earthquake Tweets

The USGS launched a new social media account (@USGS_Quakes) run by earthquake scientists and staff to "provide context for significant earthquakes and insights into seismic science."

Publications

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Year Published: 2021

Toward physics-based nonergodic PSHA: A prototype fully-deterministic seismic hazard model for southern California

We present a nonergodic framework for probabilistic seismic‐hazard analysis (PSHA) that is constructed entirely of deterministic, physical models. The use of deterministic ground‐motion simulations in PSHA calculations is not new (e.g., CyberShake), but prior studies relied on kinematic rupture generators to extend empirical earthquake rupture...

Milner, Kevin R.; Shaw, Bruce E.; Goulet, Christine A.; Richards-Dinger, Keith B.; Callaghan, Scott; Jordan, Thomas H.; Dieterich, James H.; Field, Edward H.

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Year Published: 2021

Evaluation of simulated ground motions using probabilistic seismic demand analysis: CyberShake (ver. 15.12) simulations for Ordinary Standard Bridges

There is a need for benchmarking and validating simulated ground motions in order for them to be utilized by the engineering community. Such validation may be geared towards a specific ground motion simulation method, a target engineering application, and a specific location; the validation presented herein focuses on a bridge engineering...

Fayaz, Jawad; Rezaeian, Sanaz; Zareian, Farzin

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Year Published: 2021

Evaluation of seismic hazard models with fragile geologic features

We provide an overview of a 2019 workshop on the use of fragile geologic features (FGFs) to evaluate seismic hazard models. FGFs have been scarcely utilized in the evaluation of seismic hazard models, despite nearly 30 yr having passed since the first recognition of their potential value. Recently, several studies have begun to focus on the...

Stirling, Mark W.; Oskin, Mike; Arrowsmith, J. Ramon; Rood, Anna H.; Goulet, Christine A.; Grant Ludwig, Lisa; King, Tamarah; Kottke, Albert; Lozos, Julian C.; Madugo, Chris L M; McPhillips, Devin; Rood, Dylan; Sleep, Norman; Wittich, Christine