Volcano Hazards Program Office

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USGS HVO geochemist measuring gases released from Kīlauea with a Fo...

USGS HVO geochemist measuring gases released from Kīlauea with a Fo...

USGS HVO geochemist measuring gases released from Kīlauea with a Fourier transform infrared (FTIR) spectrometer, an instrument that detects gas compositions on the basis of absorbed infrared light.

Mount Rainier, Washington simplified hazards map showing potential ...

Mount Rainier, WA simplified hazards map

This map shows areas that could be affected by debris flows, lahars, lava flows, and pyroclastic flows from Mount Rainier if events similar in size to past events occurred today. Because small lahars are more common than large ones, most lahars would be less extensive than the hazard zone shown on the map and a few would be more extensive. The lahar hazard is not equal in

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Views of Mauna Loa Volcano during clear weather day (left) and on d...

Views of Mauna Loa Volcano during clear weather day and on day when...

These views of Mauna Loa are from near the Hawaiian Volcano Observatory looking toward the west. The view on left is typical during strong trade winds that blow the plume from Halema‘uma‘u Crater southwest of the summit area. The view on right is common during slack winds that allow vog conditions to develop in the summit area of Kīlauea. During such conditions, people

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Kīlauea Volcano 2020-2021 summit eruption replaces water lake

The KW webcam has documented the recent activity within Halema‘uma‘u crater at Kīlauea's summit. The first image, taken on December 20, 2020, just after 6 p.m. HST, shows the water lake that had been growing at the base of the crater over the prior year and a half

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Clear day view of Pavlof DOL

Pavlof - DOL

 

The Pavlof team (Ketner/Wech/Wellik) activated a new camera at station DOL on Tuesday (July 4). This camera looks north and provides good coverage of the volcanic complex in this region. Read more about Pavlof volcano.

webcam image of crater hosting a lava lake

[S1cam] - Halemaʻumaʻu crater from south rim of collapse features

Live view of Halemaʻumaʻu - temporary webcam image showing the crater lava lake [S1cam].

Disclaimer: The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light and get better views through volcanic gas. At times, clouds and rain obscure visibility.

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Locations (Lat, Long, Depth) of January 17, 2010, earthquake swarm ...

Locations of Jan 17, 2010, earthquake swarm on Madison Plateau, YNP

Locations (Lat, Long, Depth) of January 17, 2010, earthquake swarm on Madison Plateau, Yellowstone National Park.

Stratified 275-m (900-ft) thick mid-Holocene pyroclastic flow and l...

Stratified 275-m (900-ft) thick mid-Holocene pyroclastic flow and l...

Visible relief in the hillside exposure is about 800-900 ft. Dusty assemblage deposit occurred approximately between 5100 and 5500 yr B.P. Magma volume of >5 km3, which is a lot for what was probably one eruptive stage. The source lava dome is gone, apparently having disintegrated entirely during extrusion and subsequent glacial interaction. Beige rocks in the

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Cleary day view of MO cam

[MOcam] Mokuʻāweoweo Caldera from South Rim

This image is from a research camera positioned on the south rim of Mokuʻāweoweo, Mauna Loa's summit caldera, in Hawaiʻi Volcanoes National Park. The camera looks north-northwest, focusing on the southern part of the caldera. The 1940 cone is just right of center; the 1949 cone is on the caldera rim at left. The high point of Mauna Loa's summit is in the background.

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Black Buttes (jagged and pointed peaks to the left) and Mount Baker...

Black Buttes and Mount Baker in WA.

Black Buttes stratovolcano and south side of ice-mantled Mount Baker. Aerial view northeastward. For Black Buttes, strata of the two highest crags (Lincoln Peak, left, and Colfax Peak) display opposing 308 dips that frame the gutted edifice. Arcuate craggy ridge of outward-dipping andesitic breccia sheets wraps ice-filled bowl where Deming Glacier has removed altered

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Broken Top volcano, inactive since 150 ka or longer, viewed to the ...

Broken Top volcano, inactive since 150 ka or longer, viewed to NW. ...

Radially dipping strata of the cone include subequal proportions of lava flows and flow breccias and of proximal agglutinate and scoria falls, nearly all having 54 to 56 percent SiO2. Numerous mafic dikes and sills intrude the cone, and an apron of compositionally similar mafic lavas extends far outward from the cone. Skyline crags behind buttress at right are top of a

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