Images

Locations and amount of slip on the Bocono and San Sebastian faults in Venezuela during earthquakes in June, 2026. The fault model was generated by Hanagan, C., Reitman, N.G., Barnhart, W.D., and Schmitt, R.

This location map and inset maps of the National Seismic Hazard Model (NSHM) show areas of interest for the populated Pacific Territories of the United States. The inset maps highlight Guam and the Commonwealth of the Northern Mariana Islands (GNMI) and American Samoa (AmSam), two large regions assessed for seismic hazards in the NSHM of 2027.

The starting view is from January, 1970, a field photo of Punta Ventana (“Window Point”) at Guayanilla, Puerto Rico (Monroe, 1980). The image fades to the March 5, 2020 color photo of the same location (ten Brink, 2020). The natural arch had collapsed from earthquake shaking on January 6, 2020 during the 2020 Southwest Puerto Rico Earthquake Sequence.

2025 USGS National Seismic Hazard Model for Puerto Rico and U.S. Virgin Islands Chance of Damaging Shaking Map; chance of slight-or-greater damaging earthquake shaking in 100 years (equivalent to Modified Mercalli Intensity VI).

10 Largest Earthquakes Ever Recorded (Updated 2025)

#10. MAGNITUDE 8.6 (1950). Arunachal Pradesh, India - Referred to as the Assam-Tibet earthquake, this quake produced intense shaking, triggered sandblows, ground cracks, and large landslides across the region. All told, 780 people died.

Jason Patton, Rob Anthony (USGS), and Skyler Grulke assemble a seismometer at the Physical Sciences Laboratory in Stoughton, Wisconsin on Aug. 7, 2025. (Photo by Taylor Wolfram / UW–Madison)

USGS Rob Anthony sets up equipment in a freezer to test a Seismometer Interface Module at the Physical Sciences Laboratory in Stoughton, Wisconsin on Aug. 7, 2025. (Photo by Taylor Wolfram / UW–Madison)

USGS Rob Anthony puts in the Seismometer Interface Module while assembling a seismometer at the Physical Sciences Laboratory in Stoughton, Wisconsin on Aug. 7, 2025. (Photo by Taylor Wolfram / UW–Madison)

Nicholas Pelyk, Jason Patton, Rob Anthony, and Skyler Grulke slide a part into the tube while assembling a seismometer at the Physical Sciences Laboratory in Stoughton, Wisconsin on Aug. 7, 2025. (Photo by Taylor Wolfram / UW–Madison)

This is an icon used for the Earthquake Notification Service product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Aftershock Forecast product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Did You Feel It? product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Earthquake Scenarios product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Ground Failure product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Moment Tensors product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the Finite Fault product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the PAGER product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the ShakeAlert product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the ShakeCast product as illustrated on the Earthquake Hazards Program products page.

This is an icon used for the ShakeMap product as illustrated on the Earthquake Hazards Program products page.

Map of the United States and its territories showing 2024 International Building Code Seismic Design Categories and Risk Categories.