Skip to main content
U.S. flag

An official website of the United States government

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.

News

Volcano Watch — What Fans the Flames Observed at Volcanic Vents?

Volcano Watch — What Fans the Flames Observed at Volcanic Vents?

Volcano Watch — Inter-Episode Rumblings at Kīlauea

Volcano Watch — Inter-Episode Rumblings at Kīlauea

New V3cam provides another livestream view of Halemaʻumaʻu

New V3cam provides another livestream view of Halemaʻumaʻu

Publications

Origins and fluxes of gas emissions from the Central Volcanic Zone of the Andes Origins and fluxes of gas emissions from the Central Volcanic Zone of the Andes

We present geochemical data from gas samples from ∼1200 km of arc in the Central Volcanic Zone of the Andes (CVZA), the volcanic arc with the thickest (∼70 km) continental crust globally. The primary goals of this study are to characterize and understand how magmatic gases interact with hydrothermal systems, assess the origins of the major gas species, and constrain gas emission rates...
Authors
J. Maarten de Moor, Peter Barry, Alejandro Rodriguez, Felipe Aguilera, Mauricio Aguilera, Cristobal Gonzalez, Susana Layana, Agostina Chiodi, Fredy Apaza, Pablo Masias, Christoph Kern, Jaime D. Barnes, Jeffrey T. Cullen, Deborah Bastoni, Alessia Bastianoni, Martina Cascone, Christofer Jimenez, Jessica Salas-Navarro, Carlos Ramirez, Gerdhard Jessen, Donato Giovannelli, Karen Lloyd

Understanding the evolution of scoria cone morphology using multivariate models Understanding the evolution of scoria cone morphology using multivariate models

Scoria cones are the most abundant type of volcano in the Solar System. They occur in every tectonic setting and often overlap with human populations, yet our ability to provide complete geochronology within volcanic fields remains limited. Appropriate geochronology underpins the reconstruction of size-frequency distribution and is a key input for robust volcanic hazard assessment...
Authors
Gabor Kereszturi, Pablo Grosse, Melody Whitehead, Marie-Noëlle Guilbaud, Drew T. Downs, Rina Noguchi, Matthieu Kervyn

The first instrumentally detected hydrothermal explosion in Yellowstone National Park The first instrumentally detected hydrothermal explosion in Yellowstone National Park

Hydrothermal explosions are one of the geological hazards most likely to impact people in Yellowstone National Park, but their frequency is poorly known. Infrasound and seismic sensors identified an explosion in Norris Geyser Basin on 15 April 2024, at 14:56 MDT (20:56 UTC)—the first instrumentally detected hydrothermal explosion in the Yellowstone region. The event affected an area tens...
Authors
M. Poland, Alexandra M. Iezzi, Jamie Farrell, R. Greg Vaughan
Was this page helpful?