Trout Lake lowland view from the south, downslope from Mount Adams, Washington. The lowland area along the White Salmon River (trees) is underlain by lahar deposits 300 and 6000 years old.
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Volcano Hazard Program images.
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Trout Lake lowland view from the south, downslope from Mount Adams,...
Trout Lake lowland view from the south, downslope from Mount Adams, Washington. The lowland area along the White Salmon River (trees) is underlain by lahar deposits 300 and 6000 years old.
Tabernacle Hill tuff cone, part of the Black Rock Desert Volcanic Field in Utah
Tabernacle Hill tuff cone, part of the Black Rock Desert Volcanic Field in Utah, used to house a lava lake in the center of the crater.
Tabernacle Hill tuff cone, part of the Black Rock Desert Volcanic Field in Utah, used to house a lava lake in the center of the crater.
Mount St. Helens Crater Glacier
Map of Mount St. Helens Crater Glacier created from LiDAR data acquired September 2009.
Map of Mount St. Helens Crater Glacier created from LiDAR data acquired September 2009.
CalVO geologist Mae Marcaida examines thin layers of volcanic ash s...
CalVO geologist Mae Marcaida examines thin layers of volcanic ash sandwiched between thick beds of sediment deposited by ancestral Mono Lake in eastern California. Each ash layer is evidence of a past explosive eruption of the Mono Craters, which began erupting about 65,000 years ago just south of present-day Mono Lake.
CalVO geologist Mae Marcaida examines thin layers of volcanic ash sandwiched between thick beds of sediment deposited by ancestral Mono Lake in eastern California. Each ash layer is evidence of a past explosive eruption of the Mono Craters, which began erupting about 65,000 years ago just south of present-day Mono Lake.
Digital Elevation Map of Mount St. Helens with annotation of pre-19...
This shaded relief image was produced from LIDAR data. LIDAR is an acronym for Light Detection and Ranging, a modern remote sensing technique used to map topography very accurately—more so than is possible with older techniques. The crater is 1.2 miles (1.9 km) wide east-west. Elsewhere the scale varies owing to the oblique viewing angle.
This shaded relief image was produced from LIDAR data. LIDAR is an acronym for Light Detection and Ranging, a modern remote sensing technique used to map topography very accurately—more so than is possible with older techniques. The crater is 1.2 miles (1.9 km) wide east-west. Elsewhere the scale varies owing to the oblique viewing angle.
Wes Hildreth at Long Valley Caldera
Wes Hildreth is an expert when it comes to studying the Long Valley Caldera. Here, he is standing on Tertiary basalt lava flows on the north rim of the caldera, view to the southeast with Lake Crowley visible in the center of the caldera, and McGee Mountain above the lake on the skyline.
Wes Hildreth is an expert when it comes to studying the Long Valley Caldera. Here, he is standing on Tertiary basalt lava flows on the north rim of the caldera, view to the southeast with Lake Crowley visible in the center of the caldera, and McGee Mountain above the lake on the skyline.
Photos taken from helicopter over Mammoth Hot Springs
Top: Examples of some of the photos taken from helicopter over Mammoth Hot Springs in September 2013. Photos taken by Hank Heasler. Bottom: Hill-shade image calculated from the 2013 DEM over Mammoth Hot Springs and that was derived from a series of overlapping photos using Structure-from-Motion photogrammetry.
Top: Examples of some of the photos taken from helicopter over Mammoth Hot Springs in September 2013. Photos taken by Hank Heasler. Bottom: Hill-shade image calculated from the 2013 DEM over Mammoth Hot Springs and that was derived from a series of overlapping photos using Structure-from-Motion photogrammetry.
Variations of repeating earthquake activity through time
Top: Map of repeating earthquake areas corresponding to the deformation episodes, below. Bottom: Left 1996-1998 Yellowstone caldera uplift episode. Middle: 1998-2004 subsidence episode. Right: 2004-2010 uplift episode. Bottom: vertical ground deformation from GPS observations at station, WLWY, on the Sour Creek resurgent dome.
Top: Map of repeating earthquake areas corresponding to the deformation episodes, below. Bottom: Left 1996-1998 Yellowstone caldera uplift episode. Middle: 1998-2004 subsidence episode. Right: 2004-2010 uplift episode. Bottom: vertical ground deformation from GPS observations at station, WLWY, on the Sour Creek resurgent dome.
Example of Yellowstone earthquake multiplets (families of repeating...
The seismic records or waveforms are from two seismic stations, and show the highly repetitive and similar nature of the seismic events.
The seismic records or waveforms are from two seismic stations, and show the highly repetitive and similar nature of the seismic events.
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.
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.
Resistivity Plot
Resistivity values for wet (average 7.8 Wt.% moisture content) compacted (lighter shades) and uncompacted (darker shades) fresh ash samples.
Resistivity values for wet (average 7.8 Wt.% moisture content) compacted (lighter shades) and uncompacted (darker shades) fresh ash samples.
Lava lake in Halema‘uma‘u remains active
The summit lava lake is contained within the Overlook crater, which is about 160 m (520 ft) by 210 m (690 ft) in size, and set within the larger Halema‘uma‘u Crater. The lava lake this week has been about 50 m (160 ft) below the rim of the Overlook crater.
The summit lava lake is contained within the Overlook crater, which is about 160 m (520 ft) by 210 m (690 ft) in size, and set within the larger Halema‘uma‘u Crater. The lava lake this week has been about 50 m (160 ft) below the rim of the Overlook crater.
summit lava lake.
A closer look at the summit lava lake.
A closer look at the summit lava lake.
Kahauale‘a 2 flow slowly moving through forest NE of Pu‘u ‘Ō‘ō
The Kahauale‘a 2 flow continues to slowly move through the forest northeast of Pu‘u ‘Ō‘ō. Today, the active flow front was 6.3 km (3.9 miles) northeast of the vent on Pu‘u ‘Ō‘ō. Pu‘u ‘Ō‘ō is just left of the center of the photograph in the distance, partially obscured by the smoke.
The Kahauale‘a 2 flow continues to slowly move through the forest northeast of Pu‘u ‘Ō‘ō. Today, the active flow front was 6.3 km (3.9 miles) northeast of the vent on Pu‘u ‘Ō‘ō. Pu‘u ‘Ō‘ō is just left of the center of the photograph in the distance, partially obscured by the smoke.
active flows at the forest boundary, and the numerous plumes of smo...
A closer view of the active flows at the forest boundary, and the numerous plumes of smoke resulting from active lava igniting ‘oKAHAKOhi‘a trees and other vegetation.
A closer view of the active flows at the forest boundary, and the numerous plumes of smoke resulting from active lava igniting ‘oKAHAKOhi‘a trees and other vegetation.
Lava lake in Halema‘uma‘u remains active
The summit lava lake is contained within the Overlook crater, which is about 160 m (520 ft) by 210 m (690 ft) in size, and set within the larger Halema‘uma‘u Crater. The lava lake this week has been about 50 m (160 ft) below the rim of the Overlook crater.
The summit lava lake is contained within the Overlook crater, which is about 160 m (520 ft) by 210 m (690 ft) in size, and set within the larger Halema‘uma‘u Crater. The lava lake this week has been about 50 m (160 ft) below the rim of the Overlook crater.
summit lava lake.
A closer look at the summit lava lake.
A closer look at the summit lava lake.
Jan 2014—Hawai‘i Island's 5th annual Volcano Awareness Month
This fissure eruption on Kīlauea's East Rift Zone in March 2011 reminds us of how exciting it can be to live on or near active volcanoes, but also why we need to be aware of the hazards they pose.
This fissure eruption on Kīlauea's East Rift Zone in March 2011 reminds us of how exciting it can be to live on or near active volcanoes, but also why we need to be aware of the hazards they pose.
Landsat 8 satellite image of Pu‘u ‘Ō‘ō flow field
This image was captured on Tuesday, December 10 by Landsat 8, a new NASA Earth-observing satellite that was launched in February of this year and entered service in May. The image shows the Pu‘u ‘Ō‘ō lava flow field on Kīlauea's east rift zone. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see.
This image was captured on Tuesday, December 10 by Landsat 8, a new NASA Earth-observing satellite that was launched in February of this year and entered service in May. The image shows the Pu‘u ‘Ō‘ō lava flow field on Kīlauea's east rift zone. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see.
Mount St. Helens and North Fork Toutle River Channel.
Mount St. Helens and North Fork Toutle River Channel.
Mount St. Helens and North Fork Toutle River Channel.
A close-up of Pele's hair at Halema‘uma‘u.
A close-up of Pele's hair at Halema‘uma‘u.
A close-up of Pele's hair at Halema‘uma‘u.