Volcano Hazards Program | U.S. Geological Survey
Source: https://volcanoes.usgs.gov
Archived: 2026-04-23 17:16
Volcano Hazards Program | U.S. Geological Survey
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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.
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
Results
Filters
Learn More
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.
Settings
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
x
Map Legend
x
Map Legend
Results
Volcano Hazards Program
Home
Volcano Updates
Monitoring
Hazards
Preparedness
Products
Data
Publications
Education
Software
Multimedia
News
Connect
About
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
USGS Volcano Observatories release regular updates and notifications to communicate increases or decreases in volcanic activity and explain unusual or hazardous circumstances.
Get Latest Updates
Volcano Hazards Assessments
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.
View Assessments
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.
Alaska Volcano Observatory (AVO)
USGS California Volcano Observatory (CalVO)
USGS Cascades Volcano Observatory (CVO)
USGS Hawaiian Volcano Observatory (HVO)
Yellowstone Volcano Observatory (YVO)
Learn More
Volcano Watch — Fountains and festivities: Kīlauea erupts episode 44 as Merrie Monarch begins
April 16, 2026
Volcano Watch — Fountains and festivities: Kīlauea erupts episode 44 as Merrie Monarch begins
Photo & Video Chronology — April 9, 2026 — Kīlauea summit episode 44
April 9, 2026
Photo & Video Chronology — April 9, 2026 — Kīlauea summit episode 44
Volcano Watch — Caldera clues: tephra deposits from Kīlauea’s past
April 9, 2026
Volcano Watch — Caldera clues: tephra deposits from Kīlauea’s past
View All
April 17, 2026
Water volumes, heat flow, and solute discharge from Old Faithful Geyser eruptions, Yellowstone National Park, USA
Water volumes, heat flow, and solute discharge from Old Faithful Geyser eruptions, Yellowstone National Park, USA
The iconic Old Faithful Geyser in Yellowstone National Park, USA, has attracted a significant amount of research because of the relative regularity and impressive size of its eruptions. Numerous studies have included observations, measurements, and analyses that informed models of geyser eruptions. However, fundamental quantities, including the associated mass and heat discharged, remain...
Authors
Shaul Hurwitz, R. Blaine McCleskey, Maxwell L. Rudolph, Sara Peek, David A. Roth, Melissa Schott-Atkins, Michael Manga, Kiernan F. Folz Donahue, Mara H. Reed, Jefferson D.G. Hungerford
By
Volcano Hazards Program
,
Volcano Science Center
April 15, 2026
Cenozoic distributed volcanism of the Arabia Plate—A review
Cenozoic distributed volcanism of the Arabia Plate—A review
Cenozoic volcanic rocks of the Arabia Plate cover about 140,000 square kilometers across a distance of about 3,000 kilometers from southern Yemen to southeastern Turkey. The majority of volcanic products are alkali basalts that erupted in restricted areas, commonly over periods of a million or more years, building mafic lava fields, each known in Arabic as a “harrat.” Harrat volcanism...
Authors
Thomas W. Sisson, Andrew T. Calvert
By
Volcano Hazards Program
,
Volcano Science Center
April 14, 2026
Mount Rainier volcanic hazard information
Mount Rainier volcanic hazard information
Introduction Eruptions at Mount Rainier produce lava flows, plumes of airborne volcanic ash, and avalanches of hot rock, ash, and gas—pyroclastic flows—that rush down the steep, ice-covered slopes of the volcano. Hot rock and ash ejected during an eruption can melt large quantities of snow and ice, forming huge, fast moving mudflows called lahars that travel 30+ miles, all the way to...
Authors
Holly F. Weiss-Racine, Joseph A. Bard, Jessica L. Ball, Carolyn L. Mastin
By
Volcano Hazards Program
,
Volcano Science Center
View All
Was this page helpful?
Skip to main content
Official websites use .gov
A
.gov
website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A
lock (
)
or
https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Filters
Learn More
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.
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
Results
Filters
Learn More
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.
Settings
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
x
Map Legend
x
Map Legend
Results
Volcano Hazards Program
Home
Volcano Updates
Monitoring
Hazards
Preparedness
Products
Data
Publications
Education
Software
Multimedia
News
Connect
About
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
USGS Volcano Observatories release regular updates and notifications to communicate increases or decreases in volcanic activity and explain unusual or hazardous circumstances.
Get Latest Updates
Volcano Hazards Assessments
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.
View Assessments
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.
Alaska Volcano Observatory (AVO)
USGS California Volcano Observatory (CalVO)
USGS Cascades Volcano Observatory (CVO)
USGS Hawaiian Volcano Observatory (HVO)
Yellowstone Volcano Observatory (YVO)
Learn More
Volcano Watch — Fountains and festivities: Kīlauea erupts episode 44 as Merrie Monarch begins
April 16, 2026
Volcano Watch — Fountains and festivities: Kīlauea erupts episode 44 as Merrie Monarch begins
Photo & Video Chronology — April 9, 2026 — Kīlauea summit episode 44
April 9, 2026
Photo & Video Chronology — April 9, 2026 — Kīlauea summit episode 44
Volcano Watch — Caldera clues: tephra deposits from Kīlauea’s past
April 9, 2026
Volcano Watch — Caldera clues: tephra deposits from Kīlauea’s past
View All
April 17, 2026
Water volumes, heat flow, and solute discharge from Old Faithful Geyser eruptions, Yellowstone National Park, USA
Water volumes, heat flow, and solute discharge from Old Faithful Geyser eruptions, Yellowstone National Park, USA
The iconic Old Faithful Geyser in Yellowstone National Park, USA, has attracted a significant amount of research because of the relative regularity and impressive size of its eruptions. Numerous studies have included observations, measurements, and analyses that informed models of geyser eruptions. However, fundamental quantities, including the associated mass and heat discharged, remain...
Authors
Shaul Hurwitz, R. Blaine McCleskey, Maxwell L. Rudolph, Sara Peek, David A. Roth, Melissa Schott-Atkins, Michael Manga, Kiernan F. Folz Donahue, Mara H. Reed, Jefferson D.G. Hungerford
By
Volcano Hazards Program
,
Volcano Science Center
April 15, 2026
Cenozoic distributed volcanism of the Arabia Plate—A review
Cenozoic distributed volcanism of the Arabia Plate—A review
Cenozoic volcanic rocks of the Arabia Plate cover about 140,000 square kilometers across a distance of about 3,000 kilometers from southern Yemen to southeastern Turkey. The majority of volcanic products are alkali basalts that erupted in restricted areas, commonly over periods of a million or more years, building mafic lava fields, each known in Arabic as a “harrat.” Harrat volcanism...
Authors
Thomas W. Sisson, Andrew T. Calvert
By
Volcano Hazards Program
,
Volcano Science Center
April 14, 2026
Mount Rainier volcanic hazard information
Mount Rainier volcanic hazard information
Introduction Eruptions at Mount Rainier produce lava flows, plumes of airborne volcanic ash, and avalanches of hot rock, ash, and gas—pyroclastic flows—that rush down the steep, ice-covered slopes of the volcano. Hot rock and ash ejected during an eruption can melt large quantities of snow and ice, forming huge, fast moving mudflows called lahars that travel 30+ miles, all the way to...
Authors
Holly F. Weiss-Racine, Joseph A. Bard, Jessica L. Ball, Carolyn L. Mastin
By
Volcano Hazards Program
,
Volcano Science Center
View All
Was this page helpful?