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Volcano Hazards Program

Find U.S. Volcano

There are about 170 potentially active volcanoes in the U.S. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption through our National Volcano Early Warning System. We deliver forecasts, warnings, and information about volcano hazards based on a scientific understanding of volcanic behavior.

News

CVO dismantles Mount St. Helens’ VALT seismic station after 18 years in service.

CVO dismantles Mount St. Helens’ VALT seismic station after 18 years in service.

Volcano Watch — More shaking on Kīlauea’s south flank. Did you feel it?

Volcano Watch — More shaking on Kīlauea’s south flank. Did you feel it?

Lassen Volcanic Center's June 24, 2024 earthquake swarm: (Background) business as usual

Lassen Volcanic Center's June 24, 2024 earthquake swarm: (Background) business as usual

Publications

Remote sensing of volcano deformation and surface change

Volcanic unrest and eruptions are associated with surface deformation and landscape change that can be detected, characterized, and tracked via remote sensing measurements. Subsurface processes, including magma accumulation, withdrawal, and transport, can cause displacements at the surface that are best tracked at subaerial volcanoes with interferometric synthetic aperture radar (InSAR) and Global
Authors
M. Poland

Characterising, quantifying, and accessing eruption source parameters of explosive volcanic eruptions for operational simulation of tephra dispersion: A current view and future perspectives

Eruption source parameters (ESPs) are crucial for characterising volcanic eruptions and are essential inputs to numerical models used for hazard assessment. Key ESPs of explosive volcanic eruptions include plume height, mass eruption rate, eruption duration, and grain-size distribution. Some of these ESPs can be directly observed during an eruption, but others are difficult to measure in real-time
Authors
Samantha Engwell, Larry G. Mastin, Contanza Bonadonna, Sara Barsotti, Natalia Irma Deligne, Bergrun A. Oladottir

Yellowstone Volcano Observatory 2023 annual report

The Yellowstone Volcano Observatory (YVO) monitors volcanic and hydrothermal activity associated with the Yellowstone magmatic system, carries out research into magmatic processes occurring beneath Yellowstone caldera, and issues timely warnings and guidance related to potential future geologic hazards. YVO is a collaborative consortium that includes the U.S. Geological Survey (USGS), Yellowstone
Authors
Yellowstone Volcano Observatory