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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 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.

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 monitoring overflight

Photo & Video Chronology — Kīlauea summit monitoring overflight

Photo & Video Chronology — Kīlauea summit tephra sampling

Photo & Video Chronology — Kīlauea summit tephra sampling

Volcano Watch — Hawaii Five-O! Fifty fountaining episodes at Kīlauea summit

Volcano Watch — Hawaii Five-O! Fifty fountaining episodes at Kīlauea summit

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Publications

Seeing is believing: Livestream video monitoring of Hawaiian eruptions Seeing is believing: Livestream video monitoring of Hawaiian eruptions

Livestream video has become a crucial tool for volcano monitoring in recent years, building upon the use of webcam snapshots that have been common for the past two decades. In Hawaii, livestream video was first tested in 2018, and today, livestream video is a vital tool for the Hawaiian Volcano Observatory and partner agencies (National Park Service and Hawaiʻi County Civil Defense) as...
Authors
Matthew R. Patrick, Ken Hon, William Tollett, Thomas-Jon Kekoa Hiroaki Hoomanawanui, Katie Mulliken, Tim R. Orr, Michael P. Poland, Kevan Kamibayashi, S. Miki Warren, Seth Swaney, Edward F. Younger, Albert Kamakeʻeaina, Steven Fuke, R. Lopaka Lee, Michael H. Zoeller, Scott R Horvath
By
Core Science Systems Mission Area, Volcano Hazards Program, Science Analytics and Synthesis (SAS), Volcano Science Center, Hawaiian Volcano Observatory, Yellowstone Volcano Observatory, Communications and Publishing

Timescales of cumulate mobilization and mixing for the 1868 A.D. eruption of Mauna Loa, Island of Hawai‘i Timescales of cumulate mobilization and mixing for the 1868 A.D. eruption of Mauna Loa, Island of Hawai‘i

The deadly 1868 A.D. eruption of Mauna Loa’s lower Southwest Rift Zone (Island of Hawai‘i) included a M7.9 earthquake and associated tsunami and landslides, demonstrating the severe hazards posed by Earth’s largest active subaerial volcano. To better understand the relationship between intense seismic activity, dike emplacement, magma storage, transport histories, and mobilization of...
Authors
Kendra J. Lynn, Jillian Schleicher, George W. Bergantz, Thomas Shea, Frank A. Trusdell
By
Volcano Hazards Program, Volcano Science Center

Geochemistry of the 2022 Mauna Loa eruption: A comparison with earlier historical summit reservoir eruptions, with implications for magma supply and recharge Geochemistry of the 2022 Mauna Loa eruption: A comparison with earlier historical summit reservoir eruptions, with implications for magma supply and recharge

On November 28th, 2022, following a record historical repose period of 38 years, Mauna Loa erupted about 145 × 106 m3 of lava and tephra over a 15-day period. The eruption was confined to the summit caldera region and the upper Northeast Rift Zone and is remarkably homogeneous in composition in both time and space. In these respects, it is typical of prior shallow summit reservoir magma...
Authors
J. Michael Rhodes, Frank A. Trusdell, Kendra J. Lynn, Drew T. Downs, Michael Vollinger
By
Volcano Hazards Program, Volcano Science Center
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