Earthquakes

By Supplemental Appropriations for Disaster Recovery Activities

More than 143 million Americans are at risk from earthquakes and accompanying hazards. Citizens, emergency responders, and engineers rely on the USGS for accurate and timely information on locations and intensity of earthquakes, human and economic impacts, and risks of future tremors.

USGS recovery and rebuilding activities for specific earthquakes are below.

Three people looking at instrumentation — USGS scientists Thomas L. Pratt and Alena L. Leads, along with Dr. Elizabeth Vanacore, associate research professor at University of Puerto Rico, analyze data in earthquake monitoring and recording equipment amid aftershocks across the island's southern coast.

Anchorage, Alaska (2018)
Ridgecrest, California (2019)
Puerto Rico (2020)
Utah (2020)

Additional Resources

USGS Earthquake Hazard Program
USGS Emergency Management
USGS Natural Hazards
National Seismic Hazard Model
Advanced National Seismic System (ANSS)
Earthquake Early Warning System
ShakeAlert

Earthquakes

Additional Resources

U.S. Geological Survey

U.S. Department of the Interior