Images

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.

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.

San Lorenzo, Puerto Rico landslide lonitoring site. The San Lorenzo monitoring station is located in a moderately vegetated area underlain by Cretaceous volcaniclastic rock. 

Debris-flow deposits downstream of the 2022 Pipeline Fire burn scar, north of Flagstaff, Arizona.

View looking down the debris slide to the pool of mud accumulating behind the ridge of dirty, snow boulders. North is towards the left 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.

On July 4, 2022, intense rainfall triggered this debris flow that damaged a home in the 2021 Muckamuck Fire in north-central Washington.

Debris flow deposit in the North Fork Feather River, Plumas County, CA near the Dixie burn area.  

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 Puerto Rico Landslide Susceptibility Map provides an interactive tool to assess landslide risk in Puerto Rico from low susceptibility to extremely high.

Completed landslide monitoring station at Adjuntas, Puerto Rico among the palms. One of the sites in the Puerto Rico Landslide Monitoring Network.

Kelli Baxstrom wires sensors to a datalogger after sensors are installed underground at the Adjuntas, Puerto Rico, landslide monitoring site, part of the Puerto Rico Landslide Monitoring Network.

Completed landslide monitoring station at Adjuntas, Puerto Rico among the palms.

Scientists assess post wildfire debris flow following the 2020 Grizzly Creek fire. 

Vehicles drive on interstate I-70 in Glenwood Canyon, Colorado. In the summer of 2021, travelers in Colorado's Glenwood Canyon were safely evacuated before massive debris flows buried highways and destroyed bridges, thanks to a debris flow warning system developed in part by the U.S. Geological Survey.

Interstate 70 through Glenwood Canyon, Colorado. In the summer of 2021, travelers in Colorado's Glenwood Canyon were safely evacuated before massive mounds of mud and rocks buried highways and destroyed bridges, thanks to a debris flow warning system developed in part by the USGS.

Debris flow in Glenwood Canyon during the summer of 2021. This event followed the 2020 Grizzly Creek Fire in Glenwood Canyon, Colorado. 

Interstate 70 in Glenwood Canyon, Colorado. In the summer of 2021, travelers in Colorado's Glenwood Canyon were safely evacuated before massive debris flows buried highways and destroyed bridges, thanks to a debris flow warning system developed in part by the U.S. Geological Survey.