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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

New USGS data release on Kīlauea lava fountain heights

New USGS data release on Kīlauea lava fountain heights

Volcano Watch — Ruby seamount: A glimpse into the secret life of a submarine volcano

Volcano Watch — Ruby seamount: A glimpse into the secret life of a submarine volcano

Photo & Video Chronology — Kīlauea summit monitoring overflight

Photo & Video Chronology — Kīlauea summit monitoring overflight

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Publications

Evolution of summit magma pressure during the 2018 caldera collapse at Kılauea volcano Evolution of summit magma pressure during the 2018 caldera collapse at Kılauea volcano

We utilized geodetic data from the 16 May to 4 August 2018 caldera collapse sequence to refine the geometries and pressure evolution of two summit reservoirs at Kīlauea volcano: the shallower Halema‘uma‘u (HMM) and deeper South Caldera (SC) reservoirs. We modeled magma reservoirs as pressurized spheroidal cavities and constrained reservoir geometries with Global Positioning System (GPS)...
Authors
Eric Berg, Taiyi A. Wang, Elizabeth Wig, Paul Segall, Kyle Anderson
By
Volcano Hazards Program, Volcano Science Center

Microgravity measurements spanning 2019–2022 indicate no change in magma supply or storage during Kilauea's reawakening Microgravity measurements spanning 2019–2022 indicate no change in magma supply or storage during Kilauea's reawakening

After more than 2 years of quiescence following its major 2018 flank lava effusion and summit caldera collapse, Kīlauea, Hawaiʻi, returned to frequent eruptive activity in late 2020. Microgravity measurements from the summit region in 2019 and 2022 span this reawakening and indicate a gravity increase of up to hundreds of microgals near the center of the summit caldera. Much of this...
Authors
Michael P. Poland, Elske de Zeeuw-van Dalfsen, Marco Bagnardi, Ashton F. Flinders, Ingrid A. Johanson, Andria P. Ellis, Michael H. Zoeller
By
Volcano Hazards Program, Volcano Science Center

Geophysical insights into Kīlauea’s eruptive reawakening after its 2018 eruption and caldera collapse Geophysical insights into Kīlauea’s eruptive reawakening after its 2018 eruption and caldera collapse

A little more than two years after the destructive 2018 lower East Rift Zone eruption and summit collapse ended, renewed volcanic activity began at Kīlauea volcano, Hawaiʻi. During 2020–2025, activity at the volcano included six eruptions in the summit caldera, one in the Southwest Rift Zone, and one in the middle East Rift Zone, as well as multiple non-eruptive intrusions in all three...
Authors
Andria P. Ellis, Michael P. Poland, Ingrid A. Johanson, Marco Bagnardi, Jefferson C. Chang, Michael H. Zoeller
By
Volcano Hazards Program, Volcano Science Center
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