Material filling the dissolved voids includes clasts of wall rock as well as beach sediments being washed into the voids. The lower structure on the left is about 0.7 m (2 ft) wide and 1.5 m (5 ft) high. Note the fracture alignment above the void structure on the right.
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Volcano Hazard Program images.
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Breccia pipes forming within existing fractures along the western shore of Yello
Material filling the dissolved voids includes clasts of wall rock as well as beach sediments being washed into the voids. The lower structure on the left is about 0.7 m (2 ft) wide and 1.5 m (5 ft) high. Note the fracture alignment above the void structure on the right.
Video of circulation in the Halema‘uma‘u water pond
This timelapse video covers about 25 minutes and shows the circulation in the water pond in Halema‘uma‘u. There appears to be an influx of water along the southern shoreline (right side in this image). A broader eastward flow of water (towards the top of the image) is evident. The video is shown twice.
This timelapse video covers about 25 minutes and shows the circulation in the water pond in Halema‘uma‘u. There appears to be an influx of water along the southern shoreline (right side in this image). A broader eastward flow of water (towards the top of the image) is evident. The video is shown twice.
Another timelapse view of the summit water pond
This timelapse video covers about 30 minutes of activity at the water pond in Halema‘uma‘u at the summit of Kīlauea. Water appears to be flowing into the pond from several locations, including the southern boundary (right side in this image). A small amount of material is also seen floating on the surface at the eastern end of the pond (top of image).
This timelapse video covers about 30 minutes of activity at the water pond in Halema‘uma‘u at the summit of Kīlauea. Water appears to be flowing into the pond from several locations, including the southern boundary (right side in this image). A small amount of material is also seen floating on the surface at the eastern end of the pond (top of image).
HVO measures water table at Keller Well
HVO field engineers and staff conducted quarterly work at a deep borehole, known as the Keller Well, at the summit of Kīlauea Volcano today (Sept. 24). They lowered a sensor into the well to measure the distance between the ground surface and the top of the water table, which was 505 m (1657 ft) below the ground surface today.
HVO field engineers and staff conducted quarterly work at a deep borehole, known as the Keller Well, at the summit of Kīlauea Volcano today (Sept. 24). They lowered a sensor into the well to measure the distance between the ground surface and the top of the water table, which was 505 m (1657 ft) below the ground surface today.
This video is shown at 30x speed and highlights the changing activity on the sur
This video is shown at 30x speed and highlights the changing activity on the surface of the water pond. Steaming shifts in the wind, and circulation of the water is evident in areas of sharp color boundaries.
This video is shown at 30x speed and highlights the changing activity on the surface of the water pond. Steaming shifts in the wind, and circulation of the water is evident in areas of sharp color boundaries.
Images taken on September 10 and 14 show the slight rise in water level, most ob
Images taken on September 10 and 14 show the slight rise in water level, most obvious by comparing the rock marked with an arrow in each photo. USGS photos by M. Patrick.
Images taken on September 10 and 14 show the slight rise in water level, most obvious by comparing the rock marked with an arrow in each photo. USGS photos by M. Patrick.
Mauna Loa: Early morning view of Moku‘āweoweo
An early morning view looking north across Moku‘āweoweo, Mauna Loa's summit caldera, from a spot near the summit cabin on the volcano's south caldera rim. Frost covered much of the caldera floor that was still shadowed, and weak steaming issued from the usual areas. Overall, there were no significant changes observed at the summit.
An early morning view looking north across Moku‘āweoweo, Mauna Loa's summit caldera, from a spot near the summit cabin on the volcano's south caldera rim. Frost covered much of the caldera floor that was still shadowed, and weak steaming issued from the usual areas. Overall, there were no significant changes observed at the summit.
Aerial view of new thermal area near Tern Lake, Yellowstone.
Aerial view of the new thermal area, in the center left. The existing Tern Lake thermal area is the bright white patch of ground in the upper middle part of the image. West Tern Lake is in the lower right. Research conducted under NPS Geology Programs Milestones Permit 2016-9.
Aerial view of the new thermal area, in the center left. The existing Tern Lake thermal area is the bright white patch of ground in the upper middle part of the image. West Tern Lake is in the lower right. Research conducted under NPS Geology Programs Milestones Permit 2016-9.
YVO scientist showing a GPS receiver and monitoring station in Yellowstone Natio
YVO scientist showing a GPS receiver and monitoring station in Yellowstone Natio
YVO scientist showing a GPS receiver and monitoring station in Yellowstone Natio
Photo of the Old Faithful area from Observation Point
Old Faithful Geyser, as well as Old Faithful Inn and the Yellowstone National Park visitor center, as viewed from the lookout on Observation Point trail.
Old Faithful Geyser, as well as Old Faithful Inn and the Yellowstone National Park visitor center, as viewed from the lookout on Observation Point trail.
More photographs of Kīlauea summit from Thursday overflight
A near-vertical view into Halema‘uma‘u, with the water pond at the bottom still in the shadow of early morning. USGS photo by D. Becker.
A near-vertical view into Halema‘uma‘u, with the water pond at the bottom still in the shadow of early morning. USGS photo by D. Becker.
Continued slow rise of water level at bottom of Halema‘uma‘u
This video sequence begins with a close-up of the fumaroles on the north side of Halema‘uma‘u, then widens to show a broader view of the crater, with the water pond at the bottom. The video then shows a close-up of the water surface, with steaming and ripples.
This video sequence begins with a close-up of the fumaroles on the north side of Halema‘uma‘u, then widens to show a broader view of the crater, with the water pond at the bottom. The video then shows a close-up of the water surface, with steaming and ripples.
Pyroclastic Flow Outcrop on the Pumice Plain at Mount St. Helens
This photo shows an outcrop of pyroclastic flow deposits near Willow Creek on the Pumice Plain at Mount St. Helens. The dramatic lines crossing the outcrop indicate contacts between different layers of pyroclastic flow deposits. Two participants of the 2019 GeoGirls program are shown studying the outcrop, using it to understand the eruptive history of the volcano.
This photo shows an outcrop of pyroclastic flow deposits near Willow Creek on the Pumice Plain at Mount St. Helens. The dramatic lines crossing the outcrop indicate contacts between different layers of pyroclastic flow deposits. Two participants of the 2019 GeoGirls program are shown studying the outcrop, using it to understand the eruptive history of the volcano.
View looking east showing the large perched lava channel on the Fissure 8 flow.
View looking east showing the large perched lava channel on the Fissure 8 flow. Puna Geothermal Venture is in the upper left. USGS photo by D. Becker.
View looking east showing the large perched lava channel on the Fissure 8 flow. Puna Geothermal Venture is in the upper left. USGS photo by D. Becker.
View looking east, showing the narrow lava channels from Fissures 6, 13, 20 and
View looking east, showing the narrow lava channels from Fissures 6, 13, 20 and 22. These channel carried lava south to the ocean in May 2018. USGS photo by D. Becker.
View looking east, showing the narrow lava channels from Fissures 6, 13, 20 and 22. These channel carried lava south to the ocean in May 2018. USGS photo by D. Becker.
Aerial view of the Halema‘uma‘u water pond
The ponded water at the bottom of Halema‘uma‘u has continued to slowly rise. This wide view shows much of Halema‘uma‘u and the fumaroles on the upper walls of the pit.
The ponded water at the bottom of Halema‘uma‘u has continued to slowly rise. This wide view shows much of Halema‘uma‘u and the fumaroles on the upper walls of the pit.
Map of Yellowstone National Park showing locations of thermal basins
Map of Yellowstone National Park showing locations of thermal basins that host hot springs, geysers, and mudpots. Dark green areas host alkaline-chloride fluids. Yellowstone Caldera margin shown as bold dashed line.
Map of Yellowstone National Park showing locations of thermal basins that host hot springs, geysers, and mudpots. Dark green areas host alkaline-chloride fluids. Yellowstone Caldera margin shown as bold dashed line.
This close-up of the eastern end of the pond provides a better view of the varyi
This close-up of the eastern end of the pond provides a better view of the varying surface color. Ripples are also obvious. USGS photo by M. Patrick, 08-30-2019.
This close-up of the eastern end of the pond provides a better view of the varying surface color. Ripples are also obvious. USGS photo by M. Patrick, 08-30-2019.
Overflight of the lower East Rift Zone
HVO conducted an overflight of the lower East Rift Zone flow field to create a thermal map, which will be posted soon on the Maps page. This wide-angle photo shows the new path of Highway 132 through the Fissure 8 lava channels.
HVO conducted an overflight of the lower East Rift Zone flow field to create a thermal map, which will be posted soon on the Maps page. This wide-angle photo shows the new path of Highway 132 through the Fissure 8 lava channels.
Heart Spring in 19989 (left) and 2019 (right).
Contrasting photos of Heart Spring on Geyser Hill in the Upper Geyser Basin from 1998 (left) and 2019 (right). Can you spot differences in the hot spring? Photos courtesy of the National Park Service.
Contrasting photos of Heart Spring on Geyser Hill in the Upper Geyser Basin from 1998 (left) and 2019 (right). Can you spot differences in the hot spring? Photos courtesy of the National Park Service.
Two HVO geologists document road cutting activities on HWY 132
Two HVO geologists document road cutting activities on HWY 132 on August 7, 2019. One geologist is taking visual photographs while another geologist is taking thermal photographs to make a tandem pair for comparison. The temperature of the solidified lava was measured to 425° C (800° F) at the digging site.
Two HVO geologists document road cutting activities on HWY 132 on August 7, 2019. One geologist is taking visual photographs while another geologist is taking thermal photographs to make a tandem pair for comparison. The temperature of the solidified lava was measured to 425° C (800° F) at the digging site.