Web Services

Web Services for real-time and catalog earthquakes, hazard maps, slabs, and more.

Seismic Stations

Ground Motion and Site Conditions

The data obtained from active source studies are archived at IRIS and/or at the National Geophysical Data Center. USGS also provides access to certain data sets.

Information and Data Outside of USGS

Non-USGS sites that host various geophysical, geodetic, and geologic data pertinent to earthquake studies: