Geologic Hazards Science Center
Latest Earthquakes
Latest Earthquakes
4.2
4 km SE of San Ramon, CA
2026-02-02 15:01:14 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
9.6 km
3.8
4 km SSE of San Ramon, CA
2026-02-02 14:27:01 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.1 km
4.2
8 km NE of Black Eagle, Montana
2026-01-29 19:41:10 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
22.5 km
5.5
9 km ESE of Dianga, China
2026-01-26 06:56:02 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
4.7
40 km S of Evanston, Wyoming
2026-01-22 14:49:21 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
14.7 km
4.3
3.7 km
3.8
4 km NW of Ohlman, Illinois
2026-01-20 07:27:40 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
8.8 km
4.9
3.1 km
6.0
10.0 km
4.2
4 km SE of San Ramon, CA
2026-02-02 15:01:14 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
9.6 km
3.8
4 km SSE of San Ramon, CA
2026-02-02 14:27:01 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
9.1 km
4.2
8 km NE of Black Eagle, Montana
2026-01-29 19:41:10 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
22.5 km
5.5
9 km ESE of Dianga, China
2026-01-26 06:56:02 (UTC)
Pager Alert Level: Yellow
MMI: VII (Very Strong Shaking)
10.0 km
4.7
40 km S of Evanston, Wyoming
2026-01-22 14:49:21 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
14.7 km
4.3
3.7 km
3.8
4 km NW of Ohlman, Illinois
2026-01-20 07:27:40 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
8.8 km
4.9
3.1 km
6.0
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
Simulated ground motion dataset in the Azores Plateau, Portugal, on rock and soil sites Simulated ground motion dataset in the Azores Plateau, Portugal, on rock and soil sites
Building on a previously developed bedrock dataset, this study extends the Azores Plateau ground motion simulations to include soil-amplified records and introduces a comprehensive validation framework. Soil amplification is modeled using one-dimensional soil profiles. A stochastic source-based approach is employed to generate the dataset, incorporating randomization of input-model...
Low-frequency earthquakes track the motion of a captured slab fragment Low-frequency earthquakes track the motion of a captured slab fragment
Accurate tectonic models are essential for assessing seismic hazard and fault interactions. However, the plate configuration at the complex Mendocino triple junction, where the San Andreas Fault and the Cascadia subduction zone meet, remains uncertain. We analyzed fault slip associated with a recently identified zone of tectonic tremor and low-frequency earthquakes (LFEs) near the...
Magnitude conversion relations create substantial differences in seismic hazard models Magnitude conversion relations create substantial differences in seismic hazard models
Earthquake catalogs are essential data inputs for seismic hazard modeling. Because earthquake magnitudes are reported in a variety of types (e.g., local magnitudes and moment magnitudes), magnitude conversion relationships must be used to convert the different magnitude types present in a catalog to a uniform magnitude type to avoid biases in the hazard computation. However, these...