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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

Save the Date - CVO Open House 2025!

Save the Date - CVO Open House 2025!

New study reveals insights into Yellowstone Volcanic System’s Hidden Magma Reservoirs

New study reveals insights into Yellowstone Volcanic System’s Hidden Magma Reservoirs

Volcano Watch — The pressure is on, within Kīlauea and for volcanologists to foretell what's next

Volcano Watch — The pressure is on, within Kīlauea and for volcanologists to foretell what's next

Publications

Long-lived partial melt beneath Cascade volcanoes

Quantitative estimates of magma storage are fundamental to evaluating volcanic dynamics and hazards. Yet our understanding of subvolcanic magmatic plumbing systems and their variability remains limited. There is ongoing debate regarding the ephemerality of shallow magma storage and its volume relative to eruptive output, and so whether an upper-crustal magma body could be a sign of...
Authors
Guanning Pang, Geoffrey A. Abers, Seth C. Moran, Weston Thelen

Physicochemical properties and bioreactivity of sub-10 µm geogenic particles: Comparison of volcanic ash and desert dust

Exposure to ambient particulate matter (PM) with an aerodynamic diameter of
Authors
Ines Tomašek, Julia Eychenne, David Damby, Adrian Hornby, Manolis N Romanias, Severine Moune, Gaëlle Uzu, Federica Schiavi, Maeva Dole, Emmanuel Gardes, Mickael Laumonier, Clara Gorce, Regine Minet-Quinard, Julie Durif, Corinne Belville, Ousmane Traore, Loic Blanchon, Vincent Sapin

The progression of basaltic–rhyolitic melt storage at Yellowstone Caldera

Yellowstone Caldera is one of the largest volcanic systems on Earth, hosting three major caldera-forming eruptions in the past two million years, interspersed with periods of less explosive, smaller-volume eruptions1. Caldera-forming eruptions at Yellowstone are sourced by rhyolitic melts stored within the mid- to upper crust. Seismic tomography studies have suggested that a broad region...
Authors
Ninfa Lucia Bennington, Adam Schultz, Paul A. Bedrosian, Esteban Bowles-Martinez, Kendra J. Lynn, Mark E. Stelten, Xiaolei Tu, Clifford Thurber
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