Mission Areas

Earthquake Hazards

Programs L2 Landing Page

Earthquakes pose significant risk to 75 million Americans in 39 States. We monitor and report earthquakes, assess earthquake impacts and hazards, and research the causes and effects of earthquakes. Our program is 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+). Tap/click on "gear icon" for options and settings.

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Did You Feel It?

Did You Feel It?

Feel an earthquake? Report it here.

View or Report

Explore the Earthquake Hazards Program

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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Map showing the M4.1 earthquake epicenter near Dover, DE
November 30, 2017

The USGS has up-to-date details on the November 30, 2017 event.

Map showing the epicenter of the November 12, 2017 earthquake Iran/Iraq border
November 12, 2017

The USGS has up-to-date details on the November 12, 2017 event.

Drop and Cover Photo
October 18, 2017

Do you know what to do the moment the ground starts shaking? Drop, Cover, and Hold On!

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USGS science for a changing world logo
Date Published: March 2, 2016

The Earthquake Hazards Program monitors and reports earthquakes, assesses earthquake impacts and hazards, and researches the causes and effects of earthquake.

USGS science for a changing world logo
Date Published: March 2, 2016

The Earthquake Hazards Program monitors and reports earthquakes, assesses earthquake impacts and hazards, and researches the causes and effects of earthquake.

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USGS
April 27, 2016

Spreadsheet Applications

A simple text format suitable for loading data into spreadsheet applications. This is a good option for manual scientific analysis.

USGS
April 27, 2016

QuakeML

A flexible, extensible and modular XML representation of seismological data which is intended to cover a broad range of fields of application in modern seismology.

USGS
April 27, 2016

Google Earth KML

This feed format is suitable for loading into applications that understand Keyhole Markup Language (KML) such as Google Earth™.

USGS
April 27, 2016

Programmatic Access

A well-structured format readily parsed by most programming languages. This is a good option for software developers wishing to use earthquake data.

USGS
April 27, 2016

Atom Syndication

A basic syndication format supported by a variety of feed readers. This is a good option for casually subscribing to earthquake information.

Screenshot of earthquake notification webpage
April 27, 2016

Earthquake Notification Service

The Earthquake Notification Service (ENS) is a free service that sends you automated notifications to your email or cell phone when earthquakes happen.

USGS Tweet Earthquake Dispatch or TED icon
April 27, 2016

Tweet Earthquake Dispatch (TED)

Tweet Earthquake Dispatch (TED) offers two Twitter accounts. On average, each account will produce about one tweet per day.

Screenshot of world map with pin dropped on coastal Equador
April 27, 2016

Did You Feel It?

Feel an earthquake? Report it here. View reported earthquakes in your area.

USGS science for a changing world logo
March 7, 2016

Real-time Earthquake Information

Get real-time earthquake notifications sent to you using a number of popular mediums: Feeds, Email, Twitter, etc…

Latest Earthquakes Interface
March 4, 2016

Latest Earthquakes Map and List

View recent events or search for past earthquakes. Optimized for mobile and desktop.

USGS science for a changing world logo
March 4, 2016

Research Data and Products

USGS earthquake data including real-time and historic earthquake catalogs, GIS data, hazards, and more.

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USGS science for a changing world logo
March 7, 2016

View recent events or search for past earthquakes. Optimized for mobile and desktop.

USGS science for a changing world logo
March 7, 2016

View recent events or search for past earthquakes. Optimized for mobile and desktop.

Filter Total Items: 266
Year Published: 2017

NEHRP turns 40

This year, the National Earthquake Hazards Reduction Program (NEHRP) turns 40, four decades since the Earthquake Hazards Reduction Act of 1977 was enacted establishing the Program, spurring numerous federal, state, and community actions to reduce earthquake losses in the U.S.A. and its territories and setting a standard for earthquake loss‐...

Leith, William S.
Attribution: Earthquake Hazards
Seismological Research Letters v.88 n.4 July-August 2017

Year Published: 2017

Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan

The U.S. Geological Survey (USGS) serves the Nation by providing reliable scientific information and tools to build resilience in communities exposed to subduction zone earthquakes, tsunamis, landslides, and volcanic eruptions. Improving the application of USGS science to successfully reduce risk from these events relies on whole community efforts...

Gomberg, Joan S.; Ludwig, Kristin A.; Bekins, Barbara; Brocher, Thomas M.; Brock, John C.; Brothers, Daniel; Chaytor, Jason D.; Frankel, Arthur; Geist, Eric L.; Haney, Matt; Hickman, Stephen H.; Leith, William S.; Roeloffs, Evelyn A.; Schulz, William H.; Sisson, Thomas W.; Wallace, Kristi; Watt, Janet; Wein, Anne
Gomberg, J.S., Ludwig, K.A., Bekins, B.A., Brocher, T.M., Brock, J.C., Brothers, Daniel, Chaytor, J.D., Frankel, A.D., Geist, E.L., Haney, Matthew, Hickman, S.H., Leith, W.S., Roeloffs, E.A., Schulz, W.H., Sisson, T.W., Wallace, Kristi, Watt, J.T., Wein, Anne, 2017, Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan: U.S. Geological Survey Circular 1428, 45 p., https://doi.org/10.3133/cir1428.

Year Published: 2017

Reducing risk where tectonic plates collide

Most of the world’s earthquakes, tsunamis, landslides, and volcanic eruptions are caused by the continuous motions of the many tectonic plates that make up the Earth’s outer shell. The most powerful of these natural hazards occur in subduction zones, where two plates collide and one is thrust beneath another. The U.S. Geological Survey’s (USGS) “...

Gomberg, Joan S.; Ludwig, Kristin A.
Gomberg, J.S., and Ludwig, K.A., 2017, Reducing risk where tectonic plates collide: U.S. Geological Survey Fact Sheet 2017–3024, 4 p., https://doi.org/10.3133/fs20173024.

Year Published: 2017

Advanced National Seismic System—Current status, development opportunities, and priorities for 2017–2027

SummaryEarthquakes pose a threat to the safety of over 143 million people living in the United States. Earthquake impacts can be significantly reduced if communities understand their risk and take proactive steps to mitigate that risk. The Advanced National Seismic System (ANSS) is a cooperative effort to collect and analyze seismic and geodetic...

Attribution: Earthquake Hazards
U.S. Geological Survey, 2017, Advanced National Seismic System—Current status, development opportunities, and priorities for 2017–2027 (ver.1.1, July 2017): U.S. Geological Survey Circular 1429, 32 p., https://doi.org/10.3133/cir1429.

Year Published: 2016

Origins of a national seismic system in the United States

This historical review traces the origins of the current national seismic system in the United States, a cooperative effort that unifies national, regional, and local‐scale seismic monitoring within the structure of the Advanced National Seismic System (ANSS). The review covers (1) the history and technological evolution of U.S. seismic...

Filson, John R.; Arabasz, Walter J.
Attribution: Earthquake Hazards
Origins of a National Seismic System in the United States John R. Filson, Walter J. Arabasz Seismological Research Letters Nov 2016,

Year Published: 2016

Effective stress, friction and deep crustal faulting

Studies of crustal faulting and rock friction invariably assume the effective normal stress that determines fault shear resistance during frictional sliding is the applied normal stress minus the pore pressure. Here we propose an expression for the effective stress coefficient αf at temperatures and stresses near the brittle-ductile transition (...

Beeler, N.M.; Hirth, Greg; Thomas, Amanda M.; Burgmann, Roland
Attribution: Earthquake Hazards

Year Published: 2015

The comparative limnology of Lakes Nyos and Monoun, Cameroon

Lakes Nyos and Monoun are known for the dangerous accumulation of CO2 dissolved in stagnant bottom water, but the shallow waters that conceal this hazard are dilute and undergo seasonal changes similar to other deep crater lakes in the tropics. Here we discuss these changes with reference to climatic and water-column data collected at both lakes...

Kling, George; Evans, William C; Tanyileke, Gregory

Year Published: 2015

How to build and teach with QuakeCaster: an earthquake demonstration and exploration tool

QuakeCaster is an interactive, hands-on teaching model that simulates earthquakes and their interactions along a plate-boundary fault. QuakeCaster contains the minimum number of physical processes needed to demonstrate most observable earthquake features. A winch to steadily reel in a line simulates the steady plate tectonic motions far from the...

Linton, Kelsey; Stein, Ross S.
How to build and teach with QuakeCaster, an earthquake demonstration and exploration tool; 2011; OFR; 2011-1158; Linton, Kelsey; Stein, Ross S.

Year Published: 2014

Rapid earthquake characterization using MEMS accelerometers and volunteer hosts following the M 7.2 Darfield, New Zealand, Earthquake

We test the feasibility of rapidly detecting and characterizing earthquakes with the Quake‐Catcher Network (QCN) that connects low‐cost microelectromechanical systems accelerometers to a network of volunteer‐owned, Internet‐connected computers. Following the 3 September 2010 M 7.2 Darfield, New Zealand, earthquake we installed over 180 QCN sensors...

Lawrence, J. F.; Cochran, E.S.; Chung, A.; Kaiser, A.; Christensen, C. M.; Allen, R.; Baker, J.W.; Fry, B.; Heaton, T.; Kilb, Debi; Kohler, M.D.; Taufer, M.
Attribution: Earthquake Hazards
Rapid earthquake characterization using MEMS accelerometers and volunteer hosts following the M 7.2 Darfield, New Zealand, Earthquake; 2014; Article; Journal; Bulletin of the Seismological Society of America; Lawrence, J. F.; Cochran, E. S.; Chung, A.; Kaiser, A.; Christensen, C. M.; Allen, R.; Baker, J. W.; Fry, B.; Heaton, T.; Kilb, D.; Kohler, M. D.; Taufer, M.

Year Published: 2014

Seismological analyses of the 2010 March 11, Pichilemu, Chile Mw 7.0 and Mw 6.9 coastal intraplate earthquakes

On 2010 March 11, a sequence of large, shallow continental crust earthquakes shook central Chile. Two normal faulting events with magnitudes around Mw 7.0 and Mw 6.9 occurred just 15 min apart, located near the town of Pichilemu. These kinds of large intraplate, inland crustal earthquakes are rare above the Chilean subduction zone, and it is...

Ruiz, Javier A.; Hayes, Gavin P.; Carrizo, Daniel; Kanamori, Hiroo; Socquet, Anne; Comte, Diana
Attribution: Earthquake Hazards
Seismological analyses of the 2010 March 11, Pichilemu, Chile Mw 7.0 and Mw 6.9 coastal intraplate earthquakes; 2014; Article; Journal; Geophysical Journal International; Ruiz, Javier A.; Hayes, Gavin P.; Carrizo, Daniel; Kanamori, Hiroo; Socquet, Anne; Comte, Diana

Year Published: 2014

Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012

The primary purpose of this report is to provide drafted field logs of exploratory trenches excavated across the Berryessa Fault section of the northern Green Valley Fault (Lienkaemper, 2012; Lienkaemper and others, 2013) in 2011 and 2012 that show evidence for at least one surface-rupturing earthquake in the past few centuries. The site location...

Lienkaemper, James J.; Rosa, Carla M.; Cappelle, Ian J.; Wolf, Evan M.; Knepprath, Nichole E.; Piety, Lucille A.; Derouin, Sarah A.; Reidy, Liam M.; Redwine, Joanna L.; Sickler, Robert R.
Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012; 2014; OFR; 2014-1033; Lienkaemper, James J.; Rosa, Carla M.; Cappelle, Ian J.; Wolf, Evan M.; Knepprath, Nichole E.; Piety, Lucille A.; Derouin, Sarah A.; Reidy, Liam M.; Redwine, Joanna L.; Sickler, Robert R.

Year Published: 2014

Global surface displacement data for assessing variability of displacement at a point on a fault

This report presents a global dataset of site-specific surface-displacement data on faults. We have compiled estimates of successive displacements attributed to individual earthquakes, mainly paleoearthquakes, at sites where two or more events have been documented, as a basis for analyzing inter-event variability in surface displacement on...

Hecker, Suzanne; Sickler, Robert; Feigelson, Leah; Abrahamson, Norman; Hassett, Will; Rosa, Carla; Sanquini, Ann
Global surface displacement data for assessing variability of displacement at a point on a fault; 2014; OFR; 2013-1305; Hecker, Suzanne; Sickler, Robert; Feigelson, Leah; Abrahamson, Norman; Hassett, Will; Rosa, Carla; Sanquini, Ann

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Map of Active Faults and Historic Earthquakes in California
2017 (approx.)

Map of historic seismicity, major faults, and paleoseismic summary of San Andreas Fault system.

November 20, 2017

A team of USGS scientists spent two weeks in the isolated Glacier Bay National Park, exploring one of the fastest-moving faults in North America.
 

May 25, 2017

Title: Underwater Secrets of the Hayward Fault Zone: Integrated 3D imaging to understand earthquake hazards 

  • Underwater imaging provides a unique opportunity to study urban fault hazards.
  • How do we link surface structures to depths where earthquakes occur?
  • How does "acoustic trenching" help us understand earthquake history?
June 15, 2016

USGS Research Geophysicist Kate Allstadt conducts experiments at the U.S. Geological Survey debris-flow flume, near Eugene, Oregon. Dr. Allstadt and her group are working toward an understanding of how debris flows generate seismic signals. The quantitative information will be used in the development of improved technologies for detecting debris flows to mitigate their destructive effects.

South Crillon Glacier
June 5, 2016

Periodic calving of ice from the snout of South Crillon Glacier.

Alaska field team
June 5, 2016

The field team included USGS geologists Rob Witter, Adrian Bender, Chris DuRoss, Peter Haeussler, Richard Lease and Kate Scharer

South Crillon Glacier
June 5, 2016

Nearly 60 years after a magnitude 7.7 earthquake struck Lituya Bay, Alaska — leading to a tsunami that devastated the area — six U.S. Geological Survey geologists revisited the isolated region of Alaska, to pick up where their scientific predecessors left off. In this photo, members of the USGS research team pause to take in the view of South Crillon Glacier from a study site along the Fairweather Fault in southeast Alaska. 

Glacier Bay National Park
June 5, 2016

Trench site along the southern Fairweather Fault, in Glacier Bay National Park, Alaska. The alluvial fan at left consists of lake, stream channel and debris flow deposits impounded by the Fairweather Fault scarp, at right.

Fairweather Fault
June 5, 2016

USGS research geologist Kate Scharer with her finger on the Fairweather Fault in southeast Alaska. The magnitude 7.8 Lituya Bay earthquake caused shaking that toppled trees along the fault, which left a break in the forest shown here.

May 20, 2016

This video presents a visualization of shaking that was recorded in the Frontier Building in Anchorage, Alaska, during the Mw7.1 earthquake, January 24, 2016, Iniskin, Alaska. It exhibits how a tall building behaves and performs during strong earthquake shaking. Note that relative to the height of the building, the motions are magnified by a factor of 300 to show deformation characteristics. This video also shows how structural monitoring projects by the USGS National Strong Motion Project can benefit the engineering and research community by capturing real-life shaking in buildings such as the Frontier Building in seismic areas.

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Map showing the M4.1 earthquake epicenter near Dover, DE
November 30, 2017

The USGS has up-to-date details on the November 30, 2017 event.

Map showing the epicenter of the November 12, 2017 earthquake Iran/Iraq border
November 12, 2017

The USGS has up-to-date details on the November 12, 2017 event.

Drop and Cover Photo
October 18, 2017

Do you know what to do the moment the ground starts shaking? Drop, Cover, and Hold On!

USGS
September 18, 2017

Just after Labor Day, U.S. Geological Survey field crews began digging a trench within the Jackson Hole Mountain Resort ski area, on the lower reaches of Buffalo Bowl. 

 

 

Map showing epicenter of 2017-09-08 earthquake offshore Mexico
September 8, 2017

A magnitude 8.1earthquake struck offshore Chiapas, Mexico on September 7, 2017 at 11:49 local time (September 8 at 04:49UTC).

 

Natural Hazard image WGSC
September 6, 2017

With hurricanes in the east and wildfires in the west, natural hazards have the potential to impact a majority of Americans every year. USGS science provides part of the foundation for emergency preparedness whenever and wherever disaster strikes.

USGS visual identity - green
August 14, 2017

The U.S. Geological Survey awarded approximately $4.9 million this week to six universities and a university-governed non-profit, to support transitioning the west coast “ShakeAlert” earthquake early warning system into a production system.

House damage in central Oklahoma from a magnitude 5.6 earthquake in 2011
August 11, 2017

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.

Earthquake Catalog Map Results Example
August 8, 2017

After the next significant earthquake, many sources will be disseminating information from a variety of accounts, tools and services.

Image: USGS Logo
July 31, 2017

A new U.S. Geological Survey-led study suggests that earthquake-related deformation just below the Earth's surface can be quite different from how it is expressed at the surface.

illustration
July 6, 2017

The USGS has up-to-date details on the July 6, 2017 event.

Image shows a road split due to earthquake damage
June 22, 2017

Earthquakes are estimated to cost the nation $6.1 billion annually in building stock losses according to an updated report published today by FEMA.

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