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Geology Detectives

solve a crime, and then use those same skills to understand the Law of Superposition (PDF)

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The 2023 Kahramanmaraş, Turkey, Earthquake Sequence

a new interactive geonarrative

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Significant Earthquakes

Significant Earthquakes Archive
What makes an earthquake "significant"?

5.6

13 km SW of Khowy, Iran
2023-03-24 03:16:57 (UTC)
Pager Alert Level: Yellow
MMI: VI (Strong Shaking)

6.5

84 km NNW of San Antonio de los Cobres, Argentina
2023-03-22 16:00:31 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)

Significant Earthquakes Archive
What makes an earthquake "significant"?

5.6

13 km SW of Khowy, Iran
2023-03-24 03:16:57 (UTC)
Pager Alert Level: Yellow
MMI: VI (Strong Shaking)

6.5

84 km NNW of San Antonio de los Cobres, Argentina
2023-03-22 16:00:31 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)

Earthquake Hazards Program

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.

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Latest Earthquakes

Latest Earthquakes Interface

Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System).

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Find an earthquake or a list of earthquakes by time window, magnitude, area, and more, and choose the output format - map and list, CVS, and others.

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News

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New Wave Glider will study Earthquake Processes along U.S. Subduction Zones

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Earthquake in Southern California 90 Years Ago Changed the Way We Build

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Vuelos sobre Puerto Rico para cartografiar la geología

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Publications

Fault roughness at seismogenic depths and links to earthquake behavior

Fault geometry affects the initiation, propagation, and cessation of earthquake rupture, as well as, potentially, the statistical behavior of earthquake sequences. We analyze 18,250 (−0.27
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Incorporation of real-time earthquake magnitudes estimated via peak ground displacement scaling in the ShakeAlert Earthquake Early Warning system

The United States earthquake early warning (EEW) system, ShakeAlert®, currently employs two algorithms based on seismic data alone to characterize the earthquake source, reporting the weighted average of their magnitude estimates. Nonsaturating magnitude estimates derived in real time from Global Navigation Satellite System (GNSS) data using peak ground displacement (PGD) scaling relationships off
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Effect of thermal and mechanical processes on hydraulic transmissivity evolution

Fracture healing is a critical component of enhanced geothermal systems, the earthquake cycle, and induced seismicity. Accordingly, there is significant interest in understanding the process of healing and its effects on fluid transport. The creation, reactivation, and sustainability of fracture networks depend on complex coupling among thermal, hydraulic, mechanical, and chemical processes. We us
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geology, Minerals, Energy, and Geophysics Science Center
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