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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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.

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News

Date published: February 16, 2021

ShakeAlert Earthquake Early Warning Delivery for the Pacific Northwest

Starting March 11, 2021, ShakeAlert®-powered earthquake early warning alerts will be available for delivery directly to wireless devices in Oregon. In May 2021, Washington state will follow suit and complete the ShakeAlert public alerting rollout across the entire West Coast. California enabled ShakeAlert-powered alerts in October 2019. 

Date published: February 4, 2021

The Disaster that Helped the Nation Prepare for Future Earthquakes: Remembering San Fernando

The San Fernando earthquake struck Southern California 50 years ago, killing 64 people and costing over $500 million in damages. The quake prompted federal, state and local action to reduce earthquake risks and bolster public safety.

Publications

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Year Published: 2021

Amateur radio operators help fill earthquake donut holes

If you’ve ever seen tall antennas rising from everyday residences in your community and wondered what they are for, it could be that those homes belong to ham radio enthusiasts who enjoy communicating with each other over the airwaves. In addition to having fun with their radios and finding camaraderie, many ham radio operators are also...

Wald, David J.; Quitoriano, Vince; Dully, Oliver

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Year Published: 2021

Characterizing fault roughness—Are faults rougher at long or short wavelengths?

Changes in fault roughness with scale, “scaling,” is the topic of this report; changes are considered using a general power law relation between some measure of surface height, H, and another of length, L, H=kLn, where k is a constant and n is an exponent that characterizes the scaling. Extensive profile measurements of natural fault surfaces show...

Beeler, Nicholas M.
Beeler, N.M., 2021, Characterizing fault roughness—Are faults rougher at long or short wavelengths?: U.S. Geological Survey Open-File Report 2020–1134, 15 p., https://doi.org/10.3133/ofr20201134.

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Year Published: 2021

Field response and surface rupture characteristics of the 2020 M6.5 Monte Cristo Range earthquake, central Walker Lane, Nevada

The M 6.5 Monte Cristo Range earthquake that occurred in the central Walker Lane on 15 May 2020 was the largest earthquake in Nevada in 66 yr and resulted in a multidisciplinary scientific field response. The earthquake was the result of left‐lateral slip along largely unmapped parts of the Candelaria fault, one of a series of east–...

Koehler, Richard D; Dee, Seth; Elliott, Austin John; Hatem, Alexandra Elise; Pickering, Alexandra; Pierce, Ian; Seitz, Gordon G.