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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

Volcano Watch — Remembering a time when I forgot that Hawaii has earthquakes

Volcano Watch — Remembering a time when I forgot that Hawaii has earthquakes

Photo & Video Chronology — Kīlauea summit intrusion cracks and ground deformation

Photo & Video Chronology — Kīlauea summit intrusion cracks and ground deformation

Volcano Watch — An intrusion during an eruption at the summit of Kīlauea

Volcano Watch — An intrusion during an eruption at the summit of Kīlauea

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Publications

Insights from more than a year of ongoing episodic lava fountaining at Kilauea Insights from more than a year of ongoing episodic lava fountaining at Kilauea

Episodic lava fountaining is rare globally, with only three occurrences from Kīlauea (Hawaii) since 1823. Beginning in December 2024, an eruption within the summit crater, Halemaʻumaʻu, has produced 52 fountaining episodes to date, each lasting typically for hours and separated by days to weeks. Although multiple mechanisms have been proposed, fundamental questions remain about how magma...
Authors
Ashton F. Flinders, Natalia I. Deligne, Ken Hon, Drew T. Downs, Kendra J. Lynn, Patricia A. Nadeau, Katie Mulliken, Jefferson C. Chang, Peter J. Dotray, Marco Bagnardi, Ingrid A. Johanson, Michael H. Zoeller, Kyle R. Anderson, Matthew R. Patrick, Christoph Kern, Christine Ruth Sealing, Michael P. Poland, David Alan Phillips, Michael Cappos, Liliana G. Desmither, Andria P. Ellis, Steven Fuke, Pauline N. Fukunaga, Madeline Kaliko Hawk, Thomas-Jon Kekoa Hiroaki Hoomanawanui, John David Jamora, Albert Keliiaimoku Kamake'eaina, Kevan Kamibayashi, William Tollett, Kody Rubio, Seth Soren Swaney, S. Miki Warren, Heather Brianne Winslow, Ninfa Lucia Bennington, Arthur Jolly, R.G. Adams, M. Decker, L. Forster, Elisabeth Gallant, Cheryl Gansecki, Richard W. Hazlett, B.F. Houghton, N. Kohagura, S. Lundblad, N.G. Pasqualon, K. Poepoe, Hannah Kelsay Neuman, C. Cauley, K. Wilde
By
Volcano Hazards Program, Volcano Science Center

2023 Volcanic activity in Alaska and the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory 2023 Volcanic activity in Alaska and the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory

No abstract available.
Authors
Jordan Edward Lubbers, Abigail M. Nastan, Matthew W. Loewen, David Fee, Darren Tan, Ronni Grapenthin, Skye Kushner, Tara Shreve, Matthew M. Haney, Kristi L. Wallace, Christopher F. Waythomas, John A. Power, Yitian Cheng, Aaron Wech, Hannah R. Dietterich
By
Volcano Hazards Program, Volcano Science Center

Volcanoes are mighty mountains Volcanoes are mighty mountains

Volcanoes are evidence of the remarkable journey of molten rock, which begins miles (kilometers) beneath our feet. What happens on magma’s ascent determines whether it erupts explosively (like Mount St. Helens on May 18, 1980), oozes lava (like Mount St. Helens during its 2004–2008 dome-building event), or cools and crystallizes underground, never to erupt at all. This two-page...
Authors
Elizabeth G. Westby, Kimber Petersen, Sonja Melander
By
Volcano Hazards Program, Volcano Science Center
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