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. Check out our Beta version.

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Errant Public Alert on 2020-05-21 in Ridgecrest Area

Errant Public Alert on 2020-05-21 in Ridgecrest Area

An errant earthquake alert was sent by the ShakeAlert earthquake early warning system to the public in the Ridgecrest area on May 21, 2020 at 14:09 UTC (2:09pm PDT).

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News

Date published: May 15, 2020

M6.5 Monte Cristo Range Earthquake

A magnitude 6.5 earthquake struck near Tonopah, Nevada, near the California-Nevada border and about 120 miles southeast of Carson City, early this morning on May 15, 2020, at 4:03 am local time (11:03:27 UTC).

Date published: May 12, 2020

Announcing Gavin Hayes as USGS Senior Science Advisor for Earthquake & Geologic Hazards

On May 10, Gavin Hayes takes on the role of Senior Science Advisor for Earthquake and Geologic Hazards within the USGS Natural Hazards Mission Area.  The Senior Science Advisor serves as the coordinator for the Earthquake Hazards, Global Seismographic Network, and Geomagnetism Programs and provides oversight and guidance across the full breadth of USGS geohazard-related activities.

Date published: May 2, 2020

Magnitude 5.4 Earthquake Felt in Puerto Rico

On May 2, 2020, a  magnitude 5.4 earthquake struck about 4 miles offshore of Tallaboa, Puerto Rico, at a depth of about 5-6 miles (9 kilometers). This story will be updated if/when more information becomes available.

Publications

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Year Published: 2020

Ground failure triggered by shaking during the November 30, 2018, magnitude 7.1 Anchorage, Alaska, earthquake

We developed an initial inventory of ground failure features from the November 30, 2018, magnitude 7.1 Anchorage earthquake. This inventory of 153 features is from ground-based observations soon after the earthquake (December 5–10) that include the presence or absence of liquefaction, landslides, and individual crack traces of lateral spreads and...

Grant, Alex R. R. ; Jibson, Randall W.; Witter, Robert C.; Allstadt, Kate E.; Thompson, Eric M.; Bender, Adrian M.
Grant, A.R.R., Jibson, R.W., Witter, R.C., Allstadt, K.E., Thompson, E.M., and Bender, A.M., 2020, Ground failure triggered by shaking during the November 30, 2018, magnitude 7.1 Anchorage, Alaska, earthquake: U.S. Geological Survey Open-File Report 2020–1043, 21 p., https://doi.org/10.3133/ofr20201043.

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Year Published: 2020

2018 U.S. Geological Survey–California Geological Survey fault-imaging surveys across the Hollywood and Santa Monica Faults, Los Angeles County, California

We acquired multiple types of seismic data across the Hollywood Fault in Hollywood, Calif., and the Santa Monica Fault in Beverly Hills, Calif., in May and June 2018. On the basis of our data, we infer near-surface locations of various traces of these faults.From two separate profiles across the Hollywood Fault, we evaluated multiple seismic...

Catchings, Rufus D.; Hernandez, Janis; Goldman, Mark R.; Chan, Joanne H.; Sickler, Robert R.; Olson, Brian; Criley, Coyn J.
Catchings, R.D., Hernandez, J., Goldman, M.R., Chan, J.H., Sickler, R.R., Olson, B., and Criley, C.J., 2020, 2018 U.S. Geological Survey–California Geological Survey fault-imaging surveys across the Hollywood and Santa Monica Faults, Los Angeles County, California: U.S. Geological Survey Open-File Report 2020–1049, 42 p., https://doi.org/10.3133/ofr20201049.

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Year Published: 2020

Airborne lidar and electro-optical imagery along surface ruptures of the 2019 Ridgecrest earthquake sequence, Southern California

Surface rupture from the 2019 Ridgecrest earthquake sequence, initially associated with the M 6.4 foreshock, occurred on July 4 on a ~17 km long, northeast-southwest oriented, left-lateral zone of faulting. Following the M 7.1 mainshock on July 5 (local time), extensive northwest-southeast-oriented, right-lateral faulting was then also mapped...

Brooks, Benjamin A.; Scharer, Katherine; Hernandez, Janis; Dawson, Timothy E.; Oskin, Mike; Arrowsmith, Ramon; Goulet, Christine A.; Blake, Kelly; Boggs, Matt; Bork, Stephan; Glennie, Craig; Fernandez-Diaz, J.C.; Singhania, Abhinav; Hauser, Darren L.; Sorhus, Sven; Hudnut, Kenneth W.; Brooks, Benjamin A.; Scharer, Katherine M.; Hernandez, Janis L.; Dawson, Timothy E.; Oskin, Michael E.; Arrowsmith, J. Ramon; Goulet, Christine A.; Blake, Kelly; Boggie, Matthew A.; Bork, Stephan; Craig L. Glennie; Fernandez-Diaz, J.C.; Singhania, Abhinav; Hauser, Darren; Sorhus, Sven