Geologic Hazards Science Center
Latest Earthquakes
Latest Earthquakes
4.6
1 km SE of Boulder Creek, CA
2026-04-02 08:41:26 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.4 km
7.4
126 km WNW of Ternate, Indonesia
2026-04-01 22:48:13 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
35.0 km
7.3
48 km ENE of Luganville, Vanuatu
2026-03-30 08:44:14 (UTC)
Pager Alert Level: Green
MMI: VII (Very Strong Shaking)
121.3 km
6.5
122 km E of Yamada, Japan
2026-03-26 14:18:51 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
9.5 km
7.5
166 km W of Neiafu, Tonga
2026-03-24 04:37:51 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
229.5 km
6.3
144 km NE of Hihifo, Tonga
2026-03-22 15:30:37 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
10.0 km
6.6
10.0 km
6.6
4.9 km
6.3
85 km W of Vallenar, Chile
2026-03-13 13:39:19 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
5.5
1 km NW of Rodotópi, Greece
2026-03-08 03:32:31 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
4.6
1 km SE of Boulder Creek, CA
2026-04-02 08:41:26 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.4 km
7.4
126 km WNW of Ternate, Indonesia
2026-04-01 22:48:13 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
35.0 km
7.3
48 km ENE of Luganville, Vanuatu
2026-03-30 08:44:14 (UTC)
Pager Alert Level: Green
MMI: VII (Very Strong Shaking)
121.3 km
6.5
122 km E of Yamada, Japan
2026-03-26 14:18:51 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
9.5 km
7.5
166 km W of Neiafu, Tonga
2026-03-24 04:37:51 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
229.5 km
6.3
144 km NE of Hihifo, Tonga
2026-03-22 15:30:37 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
10.0 km
6.6
10.0 km
6.6
4.9 km
6.3
85 km W of Vallenar, Chile
2026-03-13 13:39:19 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
5.5
1 km NW of Rodotópi, Greece
2026-03-08 03:32:31 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
Geologic Hazards Science Center
The Geologic Hazards Science Center (GHSC), on the Colorado School of Mines campus, is home to the National Earthquake Information Center (NEIC), many scientists in the Earthquake Hazards Program and Landslide Hazards Program, as well as the Geomagnetism Program staff.
Earthquake Hazards Program
Earthquake Hazards Program
The Earthquake Hazards Program provides research and information products for earthquake loss reduction, including hazard and risk assessments, comprehensive real-time earthquake monitoring, and public outreach.
Landslide Hazards Program
Landslide Hazards Program
The National Landslide Hazards Program strives to reduce long-term losses from landslide hazards by improving our understanding of the causes of ground failure and suggesting mitigation strategies.
Geomagnetism Program
Geomagnetism Program
The Geomagnetism Program provides continuous records of magnetic field variations; disseminates magnetic data; and conducts research into the nature of geomagnetic variations for purposes of scientific understanding and hazard mitigation.
News
The Loneliest Seismometers on Earth
The Loneliest Seismometers on Earth
What a Solar Superstorm Could Mean for the US
What a Solar Superstorm Could Mean for the US
USGS Awards a Dozen Landslide Risk Reduction Grants to Enhance Public Safety and Hazard Preparedness Nationwide
USGS Awards a Dozen Landslide Risk Reduction Grants to Enhance Public Safety and Hazard Preparedness Nationwide
Publications
Rapid seismic and infrasound assessment of large landslides: A case study from Denali National Park and Preserve (Alaska) Rapid seismic and infrasound assessment of large landslides: A case study from Denali National Park and Preserve (Alaska)
Large, rapid landslides are a global hazard that can occur in remote, mountainous areas. Eyewitness reports of landslides and satellite imagery can often be limited or delayed, particularly during inclement weather. However, landslide-generated seismic and infrasound (low-frequency atmospheric sound) waves can be remotely detected in near real-time. This information can significantly...
Sackung at Bald Eagle ridge, central Colorado: An updated interpretation of ridge-spreading movement, structures, and mechanisms from 50 years (1975–2025) of U.S. Geological Survey research Sackung at Bald Eagle ridge, central Colorado: An updated interpretation of ridge-spreading movement, structures, and mechanisms from 50 years (1975–2025) of U.S. Geological Survey research
Slow gravitational failures of mountain peaks and ridges are poorly understood. Herein, we report on 50 years of studies at a slowly spreading castellate ridge in the Sawatch Range in central Colorado. The orientations of geomorphic-structural features indicate that the fractured Precambrian granitic rock underlying the ridge has extended and spread northwestward toward the formerly...
The U.S. Geological Survey 2025 Puerto Rico and U.S. Virgin Islands time-independent earthquake rupture forecast The U.S. Geological Survey 2025 Puerto Rico and U.S. Virgin Islands time-independent earthquake rupture forecast
We present the 2025 U.S. Geological Survey Puerto Rico and U.S. Virgin Islands (PRVI) time‐independent earthquake rupture forecast (ERF), developed for the 2025 update to the National Seismic Hazard Model (NSHM) for PRVI. The updated ERF improves upon a prior model from 2003, including an expanded fault inventory with slip‐rate estimates, updated seismicity catalogs, and refined...