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ImageDetailsVolcanoesKeywords
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Caption:Topographic shaded relief map of Adagdak, Moffet, and Andrew Bay volcanoes, Alaska.
Date:2005 12:00 AM
Photographer:U.S. Geological Survey; BigTopo 7; Alaska Volcano Observatory
Adagdak, Moffett, Andrew Bay volcanoStratovolcano, Volcano
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Caption:Spectacular columnar joints in glassy dacite lava, north side of Cone Glacier valley, west side of Veniaminof volcano. Lava flowed against margin of glacier occupying valley in late Pleistocene and cooled rapidly as melt water penetrated along growing cooling cracks (columnar joints). Geologist is Andy Calvert.
Date:2005 12:00 AM
Photographer:Nye, C. J.
VeniaminofVolcano
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Caption:Overflight of Spurr summit
Date:December 4, 2004 12:00 AM
Photographer:Plucinski, T. A.
SpurrCaldera/crater, Glacier, Lake, Stratovolcano, Volcano
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Caption:Overflight of Spurr summit
Date:December 4, 2004 12:00 AM
Photographer:Plucinski, T. A.
SpurrCaldera/crater, Glacier, Lake, Stratovolcano, Volcano
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Caption:Overflight of Spurr summit
Date:December 4, 2004 12:00 AM
Photographer:Plucinski, T. A.
SpurrCaldera/crater, Glacier, Lake, Stratovolcano, Volcano
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Caption:Overflight of Spurr summit
Date:December 4, 2004 12:00 AM
Photographer:Plucinski, T. A.
SpurrCaldera/crater, Glacier, Lake, Stratovolcano, Volcano
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Caption:Overflight of Spurr summit
Date:December 4, 2004 12:00 AM
Photographer:Plucinski, T. A.
SpurrCaldera/crater, Glacier, Lake, Stratovolcano, Volcano
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Caption:Edgecumbe Volcano near Sitka Alaska by Duncan Marriott, December 2004. Many people forget that young volcanoes also exist in southeast Alaska. This lovely photograph of Mount Edgecumbe located about 25 km west of Sitka on the other side of Sitka Sound illustrates that volcanic activity has also occurred in the not-too-distant geologic past in the Alaska panhandle.
Date:December2004 12:00 AM
Photographer:Marriott, Duncan
EdgecumbeStratovolcano, Volcano
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Caption:Mike Doukas preparing instruments for gas flight at Mount Spurr
Date:October 30, 2004 12:00 AM
Photographer:Coombs, M. L.
SpurrFieldwork operations, People in action
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Caption:Oblique photo of the melt pit on Spurr's summit, looking west
Date:October 30, 2004 12:00 AM
Photographer:Coombs, M. L.
SpurrCaldera/crater, Dome, Glacier, Lake, Stratovolcano, Volcano
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Caption:Oblique photo of the melt pit on Spurr's summit, looking south
Date:October 30, 2004 12:00 AM
Photographer:Coombs, M. L.
SpurrCaldera/crater, Dome, Glacier, Lake, Stratovolcano, Volcano
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Caption:Oblique photo of the melt pit on Spurr's summit, looking southwest. "Peter's puka" is steaming in the foreground.
Date:October 30, 2004 12:00 AM
Photographer:Coombs, M. L.
SpurrCaldera/crater, Dome, Fumarolic activity, Glacier, Lake, Stratovolcano, Volcano
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Caption:Oblique photo of the melt pit on Spurr's summit, looking south.
Date:October 30, 2004 12:00 AM
Photographer:Coombs, M. L.
SpurrCaldera/crater, Dome, Fumarolic activity, Glacier, Lake, Stratovolcano, Volcano
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Caption:Iliamna volcano, as seen from airplane, looking west.
Date:September 13, 2004 12:00 AM
Photographer:Coombs, M. L.
IliamnaAvalanche, Stratovolcano, Volcano
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Caption:Recent avalanche on the east flank of Iliamna volcano, as seen from airplane.
Date:September 13, 2004 12:00 AM
Photographer:Coombs, M. L.
IliamnaAvalanche, Debris flow/mudflow/landslide/lahar, Stratovolcano, Volcano
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Caption:View of the south inner wall of Cone E, a post-caldera vent structure at Okmok Caldera in the eastern Aleutians. Cone E formed during multiple eruptions that produced tephra and lava flows; it collapsed in a violent explosive eruption several hundred years ago to form this crater that now contains a small lake about 425 x 200 m across. The far wall exposes the insides of Cone E and consists of layers of lava, spatter, tephra, and cross-cutting feeder dikes, or frozen conduits for magma’s ascent to the surface.
Date:September 7, 2004 12:00 AM
Photographer:Neal, C. A.
OkmokCaldera/crater, Maar/tuff cone/tuff ring
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Caption:Incandescence visible inside a ~5-10-m diameter hole in the bottom of the summit crater at Cone A, Okmok Caldera.
Date:September 6, 2004 12:00 AM
Photographer:Neal, C. A.
OkmokCinder cone
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Caption:Aerial view into the summit crater of Korovin. This level of fumarolic emission from the slightly oblong, 60–90 m (200–300 ft) diameter, sheer-walled orifice at the bottom of the crater is apparently fairly typical and can account for the periodic observations of plumes from Atka Village. At times, a shallow body of gray, turbid water partially fills the inner crater and, in 2004, was observed roiling. Phreatic explosions from this water-rich, high-temperature system may be responsible for the occasional localized ash-fall deposits seen on the upper flanks of Korovin. Photograph by R.G. McGimsey, AVO/USGS, July 19, 2004.
Date:September2004 12:00 AM
Photographer:McGimsey, R. G.
KorovinCaldera/crater, Steam, Stratovolcano, Tephra, Volcano
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Caption:Chiginagak Volcano as viewed from a tent camp on Nakalilok Bay, 12 miles to the south, late-September 2004.
Date:September2004 12:00 AM
Photographer:Schwausch, Rus
ChiginagakStratovolcano
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Caption:Incandescent rock can be seen through the small circular vent at Cone A, Okmok Volcano.
Date:September2004 12:00 AM
Photographer:Schaefer, J. R. G.
Cone ACinder cone
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Caption:A small, valley-filling lahar deposit from Okmok Volcano forms a 3-meter high outcrop on the NW shore of Umnak Island. Site 04JRSOK002A.
Date:September2004 12:00 AM
Photographer:Schaefer, J. R. G.
OkmokDebris flow/mudflow/landslide/lahar
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Caption:Cone D in the caldera at Okmok Volcano. View is to the north.
Date:September2004 12:00 AM
Photographer:Schaefer, J. R. G.
Okmok, Cone DMaar/tuff cone/tuff ring
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Caption:Blocky aa lava flow in the foreground, and cliff-forming surge deposits from an intra-caldera tuff cone eruption in the background.
Date:September2004 12:00 AM
Photographer:Schaefer, J. R. G.
OkmokLava flow, Maar/tuff cone/tuff ring
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Caption:Steam and gas coming out of Cone A, the active vent of Okmok Volcano.
Date:August 31, 2004 11:50 AM
Photographer:Reyes, C. G.
OkmokCinder cone, Steam, Volcano
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Caption:Creating station OKSO (Okmok South). "Max in the mist" -- Nicole and Max cleaning out the drill hole during the installation of a permanent GPS station at OKSO.
Date:August 29, 2004 7:32 PM
Photographer:Reyes, C. G.
OkmokFieldwork operations, People in action, Seismic/GPS installation
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