Volcano Hazards Program Office

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Time history of Yellowstone caldera uplift and subsidence patterns ...

Time history of Yellowstone caldera uplift and subsidence patterns ...

Time history of Yellowstone Caldera uplift (black line) and subsidence patterns along with quarterly catalog earthquake counts (blue bars). Note that large swarms in 1985 and 2010 accompany uplift to subsidence of caldera. The vertical deformation on the right axis was measured at the Sour Creek (SC) dome in the eastern part of the Yellowstone Caldera.

Mount St. Helens prior to the catastrophic eruption of May 18, 1980...

Mount St. Helens prior to catastrophic eruption of May 18, 1980. St...

Mount St. Helens prior to the catastrophic eruption of May 18, 1980. Streams and lava flows also visible. View is looking southerly from oblique aerial view. Mount Hood in distance.

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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Crater Lake bathymetric map showing the geology of the caldera floo...

Crater Lake bathymetric map showing the geology of the caldera floo...

Crater Lake bathymetric map showing the geology of the caldera floor with post-caldera eruptive units. Oregon

Clear day view of Peulik volcano

Peulik Volcano

Camera is located at Whale Mountain, showing a flank of Peulik, Becharof Lake, the Gas Rocks, and Chiginagak in the distance. Current image interval is 60 minutes. This camera lens is often covered by snow and ice. 

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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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.