Volcano Hazards

U.S. Volcanoes and Current Activity Alerts

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Elevated | Normal | Unassigned


There are 169 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. We accomplish this by delivering effective forecasts, warnings, and information about volcano hazards based on scientific understanding of volcanic processes.


Date published: June 4, 2020

Volcano Watch—The 1919–1920 Mauna Iki eruption at Kīlauea Volcano

As many people have noted, the last global pandemic was raging one hundred years ago.  Kīlauea was erupting 100 years ago, although it was certainly not quite as significant of an event on the world stage. This eruption a century ago produced the Mauna Iki (“little mountain”) lava shield on Kīlauea’s Southwest Rift Zone.

Date published: June 1, 2020

Yellowstone Monthly Update - June 2020

Yellowstone Volcano remains at GREEN/NORMAL. Yellowstone National Park is open and seasonal field work began last month. The University of Utah Seismograph Stations located 288 earthquakes in May that occurred as part of three swarms. Ground deformation remains unchanged from last month.

Date published: June 1, 2020

New interactive map on Yellowstone’s geology

Are you interested in Yellowstone’s dynamic geology? Do you like maps? If the answer to both questions is “yes,” then you’ll love a new online interactive map from the Wyoming State Geological Survey!

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