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The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows.

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Earthquake Plots
To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over.

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The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows.

Get Help

Earthquake Plots
To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over.

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Volcano Hazards Program

Find U.S. Volcano

There are about 160 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.

Learn more about NVEWS

Volcano Activity Notifications

Ash-rich plume rises out of Halemaʻumaʻu Crater, Kilauea Volcano Hawaiʻi

USGS Volcano Observatories release regular updates and notifications to communicate increases or decreases in volcanic activity and explain unusual or hazardous circumstances. 

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Volcano Hazards Assessments

Mount Rainier seen from Puyallup, Washington

Long-term hazards assessments identify locations at risk from volcanic hazards. They are released as high-resolution hazards-zonation maps with accompanying explanations, which help guide eruption preparedness plans.

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U.S. Volcano Observatories

Volcano Observatory staff monitor, research, and issue formal notices of activity for volcanoes in assigned geographic areas. Scientists also assess volcano hazards and work with communities to prepare for volcanic eruptions.

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News

Photo & Video Chronology — Kīlauea summit GPS survey

Photo & Video Chronology — Kīlauea summit GPS survey

Volcano Watch — Beneath the boardwalk: the scientific legacy of Haʻakulamanu

Volcano Watch — Beneath the boardwalk: the scientific legacy of Haʻakulamanu

Volcano Watch — Such great heights: measuring Kīlauea’s lava fountains

Volcano Watch — Such great heights: measuring Kīlauea’s lava fountains

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Publications

Volcanic ash in the airways: Compositional controls on inflammation, immune modulation, and infection risk Volcanic ash in the airways: Compositional controls on inflammation, immune modulation, and infection risk

Introduction More than one billion people live within 100 km of an active volcano, yet the respiratory hazard of ash resists generalization. Bulk composition modulates eruption parameters, therefore respirability, and determines the availability of crystalline silica and labile metals in basaltic ash.Areas covered We review the health-pertinent properties of volcanic ash, consistently...
Authors
Adrian J Hornby, David Damby, Jennifer R Honda
By
Volcano Hazards Program, Volcano Science Center

Non-eruptive debris flows at Mount Shasta: Historical record, drivers, and implications for future hazards Non-eruptive debris flows at Mount Shasta: Historical record, drivers, and implications for future hazards

Assessments of water-driven mass flows at snow and ice-covered volcanoes are often based on the assumption that the most impactful flows will happen during eruptions (lahars). However, as eruptions are a relatively low-probability event, non-eruptive debris flows tied to precipitation or glacial outburst floods may be more common. This is especially relevant at Mount Shasta, one of the
Authors
Jessica L. Ball, Alicia J. Hotovec-Ellis
By
Volcano Hazards Program, Volcano Science Center

Tree-ring isotope and satellite records of vegetation changes reveal transition from cold to hot degassing in the Yellowstone Plateau volcanic field Tree-ring isotope and satellite records of vegetation changes reveal transition from cold to hot degassing in the Yellowstone Plateau volcanic field

Magmatic degassing often provides the earliest clues to changes in magmatic systems, yet detection and characterization of the escaping gases is challenging. Recent work suggests that satellite-based normalized difference vegetation index (NDVI) calculations may provide an indirect method for detecting changes in degassing. Here, we use tree ring δ13⁢C, δ18⁢O, and radiocarbon (14C) data...
Authors
Robert R. Bogue, Peter M. J. Douglas, John Stix, Jessica Salas-Navarro, Etienne Boucher, Sara Peek, Laura E. Clor, Shaul Hurwitz
By
Volcano Hazards Program, Volcano Science Center
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