Geologic Hazards Science Center
Latest Earthquakes
Latest Earthquakes
6.5
42 km NNE of Goroka, Papua New Guinea
2025-12-22 10:31:28 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
110.2 km
3.9
10.0 km
4.0
5 km SSE of San Ramon, CA
2025-12-20 03:56:10 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
3.6
5 km SSE of San Ramon, CA
2025-12-20 03:49:28 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
4.0
6 km W of Glen Ellen, CA
2025-12-14 23:30:43 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
3.1 km
6.7
114 km ENE of Hachinohe, Japan
2025-12-12 02:44:12 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
10.7 km
6.6
126 km S of Honchō, Japan
2025-12-08 21:52:41 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
19.0 km
3.6
4 km SE of San Ramon, CA
2025-12-08 17:07:58 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
7.6
2025 Aomori Prefecture, Japan Earthquake
2025-12-08 14:15:10 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
45.5 km
7.0
2025 Hubbard Glacier Earthquake
2025-12-06 20:41:49 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
10.0 km
5.8
138 km NNW of Tumxuk, China
2025-12-04 07:44:07 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
3.3
4.8 km
4.0
5 km S of San Juan Bautista, CA
2025-11-27 20:57:38 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
8.2 km
6.0
12 km WNW of Susitna, Alaska
2025-11-27 17:11:29 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
69.4 km
6.5
42 km NNE of Goroka, Papua New Guinea
2025-12-22 10:31:28 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
110.2 km
3.9
10.0 km
4.0
5 km SSE of San Ramon, CA
2025-12-20 03:56:10 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
3.6
5 km SSE of San Ramon, CA
2025-12-20 03:49:28 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
4.0
6 km W of Glen Ellen, CA
2025-12-14 23:30:43 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
3.1 km
6.7
114 km ENE of Hachinohe, Japan
2025-12-12 02:44:12 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
10.7 km
6.6
126 km S of Honchō, Japan
2025-12-08 21:52:41 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
19.0 km
3.6
4 km SE of San Ramon, CA
2025-12-08 17:07:58 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.6 km
7.6
2025 Aomori Prefecture, Japan Earthquake
2025-12-08 14:15:10 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
45.5 km
7.0
2025 Hubbard Glacier Earthquake
2025-12-06 20:41:49 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
10.0 km
5.8
138 km NNW of Tumxuk, China
2025-12-04 07:44:07 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
3.3
4.8 km
4.0
5 km S of San Juan Bautista, CA
2025-11-27 20:57:38 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
8.2 km
6.0
12 km WNW of Susitna, Alaska
2025-11-27 17:11:29 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
69.4 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
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
USGS Research Links Weather Extremes to Coastal Sediment Supply in California
USGS Research Links Weather Extremes to Coastal Sediment Supply in California
Publications
Using gridded seismicity to forecast the long-term spatial distribution of earthquakes for the 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model Using gridded seismicity to forecast the long-term spatial distribution of earthquakes for the 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model
Gridded (or background) seismicity models are a critical component of probabilistic seismic hazard assessments, accounting for off‐fault and smaller‐magnitude earthquakes. They are typically developed by declustering and spatially smoothing an earthquake catalog to estimate a long‐term seismicity rate that can be used to forecast future earthquakes. Here, we present new gridded...
U.S. Geological Survey geomagnetic variometer data: Capitalizing on seismic infrastructure U.S. Geological Survey geomagnetic variometer data: Capitalizing on seismic infrastructure
The U.S. Geological Survey’s Geomagnetism Program is collaborating with the Earthquake Hazards Program and Global Seismographic Network Program to densify magnetic field observations. This collaboration focuses on the installation of magnetometers, or magnetic variometers, at existing seismic stations. Along with improving the density of space weather observations for hazard monitoring...
Ultralong, supershear rupture of the 2025 Mw 7.7 Mandalay earthquake reveals unaccounted risk Ultralong, supershear rupture of the 2025 Mw 7.7 Mandalay earthquake reveals unaccounted risk
The 28 March 2025 moment magnitude (Mw) 7.7 earthquake in Mandalay, Burma (Myanmar), ruptured 475 kilometers of the Sagaing Fault, which was more than twice the length predicted by magnitude scaling relationships. Kinematic slip models and observation of a Rayleigh Mach wave that passed through parts of Thailand confirmed that rupture occurred at supershear velocities of greater than 5...