Hurricane Helene produced widespread and damaging landslides. The USGS is mapping landslides to support our partners. This page provides information about the extent and severity of landslide impacts. Hurricane Helene made landfall in Florida as a Category 4 storm on Thursday, September 26th, 2024. The hurricane continued across the southern Appalachian Mountains producing record rainfall. This...

A landslide produced a tsunami in Pedersen Lagoon, southwest of Seward, Alaska on Wednesday, August 7th, 2024, at approximately 04:55 AKDT / 12:55 UTC. Preliminary surveying indicates that the landslide generated a tsunami of 17 meters high (approx. 56 ft) or more in Upper Pedersen Lagoon, reducing to about one meter high (approx. 3 feet) in Lower Pedersen Lagoon. Runup heights reported here are...

The Landslide Hazards Program from USGS works to help reduce the impact of landslides to people and infrastructure by furthering our understanding of causes of ground failure and by recommending strategies for risk mitigation. In Puerto Rico, USGS researchers have rigorously studied rainfall-induced landslides to provide maps that depict landslide susceptibility. Educational materials that...

In September 2017 Hurricane María triggered more than 70,000 landslides across Puerto Rico that caused loss of life and widespread damage to transportation, communication, and power-supply infrastructure, and to other public and private property.

A magnitude 6.4 earthquake occurred near Barrio Indios, Guayanilla, Puerto Rico on January 7, 2020. A study of the triggered landslides is ongoing.

The University of Puerto Rico-Mayagüez and USGS produced a landslide hazard map for the main island of Puerto Rico following Hurricane Maria. This map is today used by planners for land use decisions and emergency managers for hazard mitigation plans. To reduce loss from future landslides, the USGS and the University of Puerto Rico-Mayagüez instrumented 15 slopes across the main island and share...

Disclaimer This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely science to assess ongoing hazards. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized...

Landslide Susceptibility Data and Maps provide tools for hazard assessment prior to an event that may cause landslides.

A summary of recent and past landslides and debris flows caused by rainfall in northern California, and links to current shallow landslide monitoring.

A summary of recent and past landslides and debris flows caused by rainfall in Southern California.