Shaded relief map based on high-resolution topographic data from lidar and showing subtle terraces on the north side of Yellowstone Lake (a few example terraces are marked by yellow arrows and traced by dashed and dotted white lines).
Images
Volcano Hazard Program images.
Shaded relief map based on high-resolution topographic data from lidar and showing subtle terraces on the north side of Yellowstone Lake (a few example terraces are marked by yellow arrows and traced by dashed and dotted white lines).
View of the 2018 Kīlauea caldera collapse structures from Kīlauea Overlook within Hawai‘i Volcanoes National Park. USGS photo by K. Mulliken on Sept. 2, 2020.
View of the 2018 Kīlauea caldera collapse structures from Kīlauea Overlook within Hawai‘i Volcanoes National Park. USGS photo by K. Mulliken on Sept. 2, 2020.
On September 3, USGS HVO geologists visited fissure 7 of Kīlauea's 2018 lower East Rift Zone eruption. Geologists investigated and documented vent features, and collected samples for ongoing analyses of 2018 eruption dynamics. Fountains from fissure 7 left a hole over the vent area.
On September 3, USGS HVO geologists visited fissure 7 of Kīlauea's 2018 lower East Rift Zone eruption. Geologists investigated and documented vent features, and collected samples for ongoing analyses of 2018 eruption dynamics. Fountains from fissure 7 left a hole over the vent area.
Photo of Kīlauea's 2018 lower East Rift Zone eruption fissure 7, from Hookupu street and looking west. The rampart is surrounded by fissure 8 lava. This view is of the back side of the rampart; lava fountains erupted on the opposite side of the rampart.
Photo of Kīlauea's 2018 lower East Rift Zone eruption fissure 7, from Hookupu street and looking west. The rampart is surrounded by fissure 8 lava. This view is of the back side of the rampart; lava fountains erupted on the opposite side of the rampart.
View of the front side of fissure 7 rampart, erupted during Kīlauea's 2018 lower East Rift Zone eruption. Red oxidation is present in lower layers within the rampart. Golden shelly pāhoehoe from fissure 8 surrounds the rampart.
View of the front side of fissure 7 rampart, erupted during Kīlauea's 2018 lower East Rift Zone eruption. Red oxidation is present in lower layers within the rampart. Golden shelly pāhoehoe from fissure 8 surrounds the rampart.
On September 3, USGS HVO geologists also visited fissure 21 of Kīlauea's 2018 lower East Rift Zone eruption. Geologists investigated and documented vent features, and collected samples for ongoing analyses of 2018 eruption dynamics. View of fissure 21 from the northeast. A small hole has formed from collapse of the rampart.
On September 3, USGS HVO geologists also visited fissure 21 of Kīlauea's 2018 lower East Rift Zone eruption. Geologists investigated and documented vent features, and collected samples for ongoing analyses of 2018 eruption dynamics. View of fissure 21 from the northeast. A small hole has formed from collapse of the rampart.
This photo views fissure 21, of Kīlauea's 2018 lower East Rift Zone eruption, from the southeast.
This photo views fissure 21, of Kīlauea's 2018 lower East Rift Zone eruption, from the southeast.
Front side of fissure 21 of Kīlauea's 2018 lower East Rift Zone eruption. Red oxidation and white mineral precipitates color the front of the rampart. Fountains erupted immediately in front of this feature.
Front side of fissure 21 of Kīlauea's 2018 lower East Rift Zone eruption. Red oxidation and white mineral precipitates color the front of the rampart. Fountains erupted immediately in front of this feature.
View of the 2018 Kīlauea caldera collapse structures from Kīlauea Overlook within Hawai‘i Volcanoes National Park. USGS photo by K. Mulliken on Sept. 2, 2020.
View of the 2018 Kīlauea caldera collapse structures from Kīlauea Overlook within Hawai‘i Volcanoes National Park. USGS photo by K. Mulliken on Sept. 2, 2020.
The UNAVCO-operated geodetic infrastructure located in Yellowstone National Park consists of over a dozen continuously operating geodetic sites. Most of these sites stream real-time data to the UNAVCO data center. After the September 2020 maintenance trip, there are now 8 fully upgraded GNSS sites (red square) located in the park.
The UNAVCO-operated geodetic infrastructure located in Yellowstone National Park consists of over a dozen continuously operating geodetic sites. Most of these sites stream real-time data to the UNAVCO data center. After the September 2020 maintenance trip, there are now 8 fully upgraded GNSS sites (red square) located in the park.
Thin section made by slicing a small layer off the surface of a hand sample of Yeloowstone lava. Note the marker for scale.
Thin section made by slicing a small layer off the surface of a hand sample of Yeloowstone lava. Note the marker for scale.
Hawaiian Volcano Observatory (HVO) Global Positioning System (GPS) survey near the coast in Hawai‘i Volcanoes National Park on September 10, 2019 (USGS photo by P. Dotray).
Hawaiian Volcano Observatory (HVO) Global Positioning System (GPS) survey near the coast in Hawai‘i Volcanoes National Park on September 10, 2019 (USGS photo by P. Dotray).
An example of a boundary iproblem n the Yellowstone National Park geologic map, which was stitched together from many smaller mapped sections. The red line highlights the contacts that contain different units across the boundary.
An example of a boundary iproblem n the Yellowstone National Park geologic map, which was stitched together from many smaller mapped sections. The red line highlights the contacts that contain different units across the boundary.
Giantess Geyser in eruption at approximately 10:00 AM MDT on August 26, 2020. Old Faithful is erupting in the center background.
Giantess Geyser in eruption at approximately 10:00 AM MDT on August 26, 2020. Old Faithful is erupting in the center background.
The colorful caldera lake at Kīlauea summit. The view is from the western rim of Halema‘uma‘u crater, 1900 ft (580 m) above the water surface, in a restricted area of Hawai‘i Volcanoes National Park. USGS photo by M. Patrick 08/25/2020.
The colorful caldera lake at Kīlauea summit. The view is from the western rim of Halema‘uma‘u crater, 1900 ft (580 m) above the water surface, in a restricted area of Hawai‘i Volcanoes National Park. USGS photo by M. Patrick 08/25/2020.
A scanned image of Rocky Mountain juniper deadwood sample GGR100 collected in the northern part of Yellowstone National Park under permit YELL-5582. The full length of this sample covers the time period 723-1792 CE.
A scanned image of Rocky Mountain juniper deadwood sample GGR100 collected in the northern part of Yellowstone National Park under permit YELL-5582. The full length of this sample covers the time period 723-1792 CE.
Radar image of the May 17, 2018 eruption of ash from Halema‘uma‘u Crater. This image is a slice through the cloud at an altitude of 14,000 ft (4 km) above sea level at 4:12 a.m., HST. The colors scale is radar reflectivity, a measure of the size of the particles and their concentration within the ash cloud.
Radar image of the May 17, 2018 eruption of ash from Halema‘uma‘u Crater. This image is a slice through the cloud at an altitude of 14,000 ft (4 km) above sea level at 4:12 a.m., HST. The colors scale is radar reflectivity, a measure of the size of the particles and their concentration within the ash cloud.
Nā‘ālehu radome, 39 ft (about 12 m) in diameter. The radar dish inside is 28 ft (8.5 m) across. USGS photo by C. Neal on July 27, 2019.
Nā‘ālehu radome, 39 ft (about 12 m) in diameter. The radar dish inside is 28 ft (8.5 m) across. USGS photo by C. Neal on July 27, 2019.
Cross section through the Earth showing the ground surface with an embedded pressure source (red circle)—the so-called “Mogi model”—beneath the ground. When this pressure source expands, the ground surface inflates like a balloon (the opposite occurs when the pressure in the source decreases). Dashed black line shows, in an exaggerated way, how the shape
Cross section through the Earth showing the ground surface with an embedded pressure source (red circle)—the so-called “Mogi model”—beneath the ground. When this pressure source expands, the ground surface inflates like a balloon (the opposite occurs when the pressure in the source decreases). Dashed black line shows, in an exaggerated way, how the shape
Photo looking north from the north shore of Yellowstone Lake. The photo was taken from a level bench, or terrace, which marks a previous high stand of the lake. In the middle distance (between the two red lines), the ground slopes up to second, higher-level terrace that indicates an even higher past lake level.
Photo looking north from the north shore of Yellowstone Lake. The photo was taken from a level bench, or terrace, which marks a previous high stand of the lake. In the middle distance (between the two red lines), the ground slopes up to second, higher-level terrace that indicates an even higher past lake level.
Black streak on caldera wall (center) is about 50 m (yards) long, and white steam plume (lower right) rises from northwestern part of Halema‘uma‘u. Photo from Volcano House Hotel on July 4, 2018. The configuration of this area changed considerably after the photo was taken, as collapse continued into early August. USGS photo.
Black streak on caldera wall (center) is about 50 m (yards) long, and white steam plume (lower right) rises from northwestern part of Halema‘uma‘u. Photo from Volcano House Hotel on July 4, 2018. The configuration of this area changed considerably after the photo was taken, as collapse continued into early August. USGS photo.