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.

Bedinger staff profile - poster presentation at AGU 2023                                                                    

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

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

Profile photo of Liam Toney for United States Geological Survey profile page; November 9, 2023.

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

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.

Landslides near the 2017 Thomas fire burn area that initiated during a series of atmospheric river events in December 2022 and January 2023.  

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.

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.

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.

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.

Cartoon of half-space model. A half space is a mathematical model used to approximate the earth when performing some calculations in seismology. The model is much simpler than the real earth.

Diagram of dipping slab with different focal depth events. The focal depth refers to the depth of an earthquake hypocenter.

Small foreshocks on a seismic record. Foreshocks are relatively smaller earthquakes that precede the largest earthquake in a series, which is termed the mainshock. Not all mainshocks have foreshocks.