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Geologic Hazards Science Center images.
From the 2003 NSHM by Mueller et al., 2010, the distribution of spectral acceleration (SA in %g) is shown for Puerto Rico and the U.S. Virgin Islands.
From the 2003 NSHM by Mueller et al., 2010, the distribution of spectral acceleration (SA in %g) is shown for Puerto Rico and the U.S. Virgin Islands.
A landslide monitoring station within the footprint of the 2016 Fish Fire in the San Gabriel Mountains of southern California. The station collects surface and subsurface data to monitor and detect changes in local hillslope hydrologic conditions.
A landslide monitoring station within the footprint of the 2016 Fish Fire in the San Gabriel Mountains of southern California. The station collects surface and subsurface data to monitor and detect changes in local hillslope hydrologic conditions.
The USGS Postfire Landslide Monitoring Station “Maria Ygnacio” is located within the Los Padres National Forest in the Santa Ynez Mountains of southern California. The site consists of surface and subsurface instrumentation that is monitoring the hillslope shown in this image.
The USGS Postfire Landslide Monitoring Station “Maria Ygnacio” is located within the Los Padres National Forest in the Santa Ynez Mountains of southern California. The site consists of surface and subsurface instrumentation that is monitoring the hillslope shown in this image.
University of Puerto Rico, Mayagüez and USGS scientists working on the Añasco monitoring station
University of Puerto Rico, Mayagüez and USGS scientists working on the Añasco monitoring station
Stephen Hughes, Gabriel Colón, and Ednet López stand on hillslope next to completed landslide monitoring station at Añasco, Puerto Rico
Stephen Hughes, Gabriel Colón, and Ednet López stand on hillslope next to completed landslide monitoring station at Añasco, Puerto Rico
Situated on a vegetated hillslope surrounded by cattle, is the Añasco monitoring station. A fence was built around the station to keep the grazing cattle from damaging any of the station components
Situated on a vegetated hillslope surrounded by cattle, is the Añasco monitoring station. A fence was built around the station to keep the grazing cattle from damaging any of the station components
Figure showing photos of minor and major postfire hydrologic response following storms in coastal California, from the study "Postfire hydrologic response along the Central California (USA) coast: insights for the emergency assessment of postfire debris-flow hazards".
Figure showing photos of minor and major postfire hydrologic response following storms in coastal California, from the study "Postfire hydrologic response along the Central California (USA) coast: insights for the emergency assessment of postfire debris-flow hazards".
Charlie Miles performing field work on the Alaskan Gyre at the Prince William Sound, Alaska
Charlie Miles performing field work on the Alaskan Gyre at the Prince William Sound, Alaska
Pit dug for collection of geologic data and observations, such as geochronology samples to determine the age of faulted surfaces and documentation and dating of faulted recent sediments of the Puya Fault in northern New Mexico, 4/25/2023.
Pit dug for collection of geologic data and observations, such as geochronology samples to determine the age of faulted surfaces and documentation and dating of faulted recent sediments of the Puya Fault in northern New Mexico, 4/25/2023.
Map showing distribution of average annualized earthquake loss by region. The high concentration of loss in California and the West Coast is consistent with that region’s high seismic hazard, significant population, and building exposure.
Map showing distribution of average annualized earthquake loss by region. The high concentration of loss in California and the West Coast is consistent with that region’s high seismic hazard, significant population, and building exposure.
Although most economic loss is concentrated along the west coast, the distribution of relative earthquake risk, as measured by the Annualized Earthquake Loss Ratio (AELR), is spread throughout the country and it reinforces the fact that earthquakes are a national problem.
Although most economic loss is concentrated along the west coast, the distribution of relative earthquake risk, as measured by the Annualized Earthquake Loss Ratio (AELR), is spread throughout the country and it reinforces the fact that earthquakes are a national problem.
Landslides near the 2017 Thomas fire burn area that initiated during a series of atmospheric river events in December 2022 and January 2023.
Landslides near the 2017 Thomas fire burn area that initiated during a series of atmospheric river events in December 2022 and January 2023.
University of Puerto Rico-Mayagüez students Estefania Vicens, Tania Figueroa, Anishka Ruiz, Cesar Rodriguez, and Kimberly Maisonet stand next to completed landslide monitoring station at Yauco, Puerto Rico, part of the Landslide Monitoring Network.
University of Puerto Rico-Mayagüez students Estefania Vicens, Tania Figueroa, Anishka Ruiz, Cesar Rodriguez, and Kimberly Maisonet stand next to completed landslide monitoring station at Yauco, Puerto Rico, part of the Landslide Monitoring Network.
Estefania Vicens, Tania Figueroa, Kimberly Trahan, Victor Ortega stand next to completed Mayagüez monitoring station, part of the Puerto Rico Landslide Monitoring Network
Estefania Vicens, Tania Figueroa, Kimberly Trahan, Victor Ortega stand next to completed Mayagüez monitoring station, part of the Puerto Rico Landslide Monitoring Network
Completed landslide monitoring station at Ponce, Puerto Rico among the palms. One of the sites in the Puerto Rico Landslide Monitoring Network.
Completed landslide monitoring station at Ponce, Puerto Rico among the palms. One of the sites in the Puerto Rico Landslide Monitoring Network.
Example of a landslide that initiated within the footprint of the 2019 Cave Fire during the 9 January 2023 rainstorm. The landslide source area is shown in the upper left of this image. The debris-flow runout path is shown in the center and lower right of this image.
Example of a landslide that initiated within the footprint of the 2019 Cave Fire during the 9 January 2023 rainstorm. The landslide source area is shown in the upper left of this image. The debris-flow runout path is shown in the center and lower right of this image.
The large HTHH volcanic explosion created fast low-frequency pressure waves that penetrated about 3.1 miles/5 kilometers into the shallow crust (shown in yellow). Wind and small explosions (shown in blue) create shorter pressure waves that only penetrate down about 328 feet/100 meters.
The large HTHH volcanic explosion created fast low-frequency pressure waves that penetrated about 3.1 miles/5 kilometers into the shallow crust (shown in yellow). Wind and small explosions (shown in blue) create shorter pressure waves that only penetrate down about 328 feet/100 meters.
The waveforms of the ground motion recording and the pressure sensor recording from a station with both types of instruments (see second image above) match up, indicating that the pressure waves are causing the ground (crust) to deflect.
The waveforms of the ground motion recording and the pressure sensor recording from a station with both types of instruments (see second image above) match up, indicating that the pressure waves are causing the ground (crust) to deflect.
Debris-flow deposits downstream of the 2022 Pipeline Fire burn scar, north of Flagstaff, Arizona.
Debris-flow deposits downstream of the 2022 Pipeline Fire burn scar, north of Flagstaff, Arizona.
The June 28, 2022, Chaos Canyon debris slide with main features labeled. Horizontal distance from the middle of headscarp to the middle of toe is about 585 m. North is towards the right side of the photograph.
The June 28, 2022, Chaos Canyon debris slide with main features labeled. Horizontal distance from the middle of headscarp to the middle of toe is about 585 m. North is towards the right side of the photograph.
The USGS “Heil Ranch” site is located in the Arapahoe-Roosevelt National Forest in Colorado. The site consists of instrumentation monitoring the rainfall and soil moisture.
The USGS “Heil Ranch” site is located in the Arapahoe-Roosevelt National Forest in Colorado. The site consists of instrumentation monitoring the rainfall and soil moisture.