Mission Areas

Earthquake Hazards

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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.

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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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News

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.

Turnagain Arm Railway
June 21, 2017

Subduction zone events pose significant threats to lives, property, economic vitality, cultural and natural resources and quality of life. The tremendous magnitudes of these events are unique to subduction zones, and they can have cascading consequences that reverberate around the globe.

Graphic of a seismometer reading
May 25, 2017

The USGS Earthquake Hazards Program recently released a new strategic plan for earthquake monitoring entitled the “Advanced National Seismic System – Current Status, Development Opportunities, Priorities, 2017-2027.”

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USGS science for a changing world logo
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
March 2, 2016

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

Filter Total Items: 11
USGS logo
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 logo
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 logo
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 logo
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 logo
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: 268
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 2017–27

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 2017–27: U.S. Geological Survey Circular 1429, 32 p., https://doi.org/10.3133/cir1429.

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

Year Published: 2014

Response of Global Navigation Satellite System receivers to known shaking between 0.2 and 20 Hertz

Over the past decade, several technological advances have allowed Global Navigation Satellite Systems (GNSS) receivers to have the capability to record displacements at high frequencies, with sampling rates approaching 100 samples per second (sps). In addition, communication and computer hardware and software have allowed various institutions,...

Langbein, John; Evans, John R.; Blume, Fredrick; Johanson, Ingrid
Response of Global Navigation Satellite System receivers to known shaking between 0.2 and 20 Hertz; 2014; OFR; 2013-1308; Langbein, John; Evans, John R.; Blume, Fredrick; Johanson, Ingrid

Year Published: 2014

Triggered aseismic slip adjacent to the 6 February 2013 Mw 8.0 Santa Cruz Islands megathrust earthquake

Aseismic or slow slip events have been observed in many subduction zones, but whether they affect the occurrence of earthquakes or result from stress changes caused by nearby events is unclear. In an area lacking direct geodetic observations, inferences can be made from seismological studies of co-seismic slip, associated stress changes and the...

Hayes, Gavin P.; Furlong, Kevin P.; Benz, Harley M.; Herman, Matthew W.
Attribution: Earthquake Hazards
Triggered aseismic slip adjacent to the 6 February 2013 Mw 8.0 Santa Cruz Islands megathrust earthquake; 2014; Article; Journal; Earth and Planetary Science Letters; Hayes, Gavin P.; Furlong, Kevin P.; Benz, Harley M.; Herman, Matthew W.

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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

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.

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

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.

Standing Masonry Buildings in Kathmandu, Nepal
April 2016 (approx.)

Standing masonry buildings in Kathmandu suggest that shaking was not amplified in the valley sediments surrounding Kathmandu

Damaged Monument Kathmandu, Nepal
April 2016 (approx.)

Major damage was more likely to monuments in Kathmandu, Nepal than more modern structures

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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.

Turnagain Arm Railway
June 21, 2017

Subduction zone events pose significant threats to lives, property, economic vitality, cultural and natural resources and quality of life. The tremendous magnitudes of these events are unique to subduction zones, and they can have cascading consequences that reverberate around the globe.

Graphic of a seismometer reading
May 25, 2017

The USGS Earthquake Hazards Program recently released a new strategic plan for earthquake monitoring entitled the “Advanced National Seismic System – Current Status, Development Opportunities, Priorities, 2017-2027.”

Image shows an aerial view of the San Andreas Fault
May 19, 2017

This EarthWord isn’t a new dance-move; it’s been around since we’ve had tectonic plates...

Image Placeholder
May 18, 2017

Members of the news media are invited to attend the next Earthquake Country Alliance - Bay Area Regional Workshop to be held at the U.S. Geological Survey in Menlo Park on May 23. ECA workshops are educational and informational opportunities to learn more about the latest in earthquake science, preparedness, and mitigation, as well as to arrange interviews with subject matter experts.

USGS map displaying potential to experience damage from a natural or human-induced earthquake in 2017
May 15, 2017

It’s not just something you run into on a golf course-it’s this week’s EarthWord!

2014 South Napa Earthquake in California
May 15, 2017

Early on the morning of August 24, 2014, Loren Turner was awoken by clattering window blinds, a moving bed, and the sound of water splashing out of his backyard pool. He experienced what is now named the “South Napa Earthquake.” 

A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06.
April 28, 2017

Which U.S. State or territory has more large earthquakes than the rest of the United States combined?

person standing next to large boulder
March 20, 2017

Geologists have discovered evidence that unusual seas detached living corals from a Caribbean reef and scattered them far inland, as boulders, during the last centuries before Columbus arrived. The new findings will reinforce precautions against coastal hazards, Caribbean tsunami specialists said.

USGS logo
February 17, 2017

Small variations in the density of the earth’s crust—undetectable to humans without sensitive instruments—influence where earthquakes may occur in the central United States. These new findings from the U.S. Geological Survey, published today in Nature Communications, may allow scientists to map where future seismicity in the center of the country is most likely.

K2 Seismic Station
February 2, 2017

The U. S. Geological Survey is seeking volunteers to host temporary seismic stations in the Walnut Creek/Pleasant Hill/Concord California area. Volunteers will be assisting with a new ground motion study that will begin in March 2017.

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