Images

Photo of ash-fall deposit of the Lava Creek Tuff overlying the lower “unknown” ignimbrite (an ash-flow unit, denoted by light yellow box).  Images of quartz-hosted melt inclusions show fully “baked” (dark) melt inclusions in the lowest ash fall layers (1–2).

Regional shaded relief map of the Eastern Snake River Plain (ESRP). The map highlights the low relief terrain of the ESRP and the dramatic rhyolite domes that punctuate it. Map by Zach Lifton, Idaho Geological Survey.

Shaded relief maps based on lidar data and showing landslides in the area of Yankee Jim Canyon, Montana. Lidar imagery is given as a colored, shaded slope map, with higher elevations in brown and white, and lower elevations in green. Darker shading indicates steeper slopes.

Scanning electron microscope (SEM) photograph of a diatom on a lodgepole pine needle from Upper Geyser Basin. A 10 micrometer (µm) scale is shown at the bottom of the image (slightly less than the width of human hair).

River levels and vertical deformation of Yellowstone caldera during 2016–2022.  River level (blue) was measured at the Corwin Springs gaging station on the Yellowstone River, just north of Yellowstone National Park.  Vertical deformation (red) is from the WLWY GPS station on the east side of Yellowstone caldera.  The GPS data indicate overall subsiden

Map of Yellowstone caldera showing the locations and ages of the most recent rhyolite eruptions at Yellowstone, the Central Plateau Member rhyolites. Unit boundaries are from Christiansen (2001).

Monitoring station VALT, in the crater of Mount St. Helens, in 2023. Anxious about damage to the station from the advancing Crater Glacier (the rock and snow-covered cliff) and hazards to people working at the site, a CVO field team dismantled VALT on June 6, 2024 after 18 years in service. It will be rebuilt farther from the glacier. 

Bison in Yellowstone National Park. USGS photo by Jennifer Lewicki, September 20, 2023.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

HVO geologists observed the new eruption within Kīlauea summit caldera during an eruption-monitoring overflight the morning of September 11, 2023. Multiple minor fountains remain active in the eastern portion of Halema‘uma‘u crater floor and on the downdropped block within Kīlauea's summit caldera.

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Section of a sediment core from Rush Lake, Lower Geyser Basin, Yellowstone National Park.

GPS data from station P716, near Canyon Village, spanning 2005–2023. Top plot shows motion in a north-south direction (positive change is north), middle is east-west motion (positive change is east), and bottom plot is up-down motion (positive change is up).