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ImageDetailsVolcanoesKeywords
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Caption:John Eichelberger on the west rim of Katmai Caldera.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
KatmaiCaldera/crater
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Caption:Geologists on the west rim of Katmai Caldera. L-R, Jack Kleinman, John Paskievitch, Susan Walker, Game McGimsey, and John Eichelberger.
Date:July 16, 1990 12:00 AM
Photographer:McGimsey, Game
People in action
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Caption:Mount Mageik (2,165 m [7,103 ft] high) and Mount Martin (1,863 m [6,112 ft] high; on skyline at right) volcanoes, both emitting steam plumes from their summits, as viewed to the southwest from across the Valley of Ten Thousand Smokes, Katmai National Park and Preserve, Alaska. Photograph by R. McGimsey, U.S. Geological Survey, July 15, 1990.
Date:July 15, 1990 12:00 AM
Photographer:McGimsey, R. G.
Martin, MageikSteam, Volcano
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Caption:The multiple peaks of Trident Volcano as viewed from the top of Baked Mountain in the Valley of Ten Thousand Smokes, Alaska. Trident Volcano is composed of a cluster of andesite and dacite cones and is the only Katmai group volcano other than Katmai and Novarupta to have had historical activity. The Novarupta lava dome is visible at bottom, center. Photograph by R. McGimsey, U.S. Geological Survey, July 12, 1990.
Date:July 12, 1990 12:00 AM
Photographer:McGimsey, G.
Trident, NovaruptaDome, Volcano
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Caption:Mount Griggs volcano, 2,317-m (7,602 ft)-high, lies 10 km (6 mi) behind the volcanic arc defined by other Katmai group volcanoes. Although no historical eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The slopes of Mount Griggs are heavily mantled by fallout from the 1912 Novarupta eruption. View is to the northeast. Photograph by Game McGimsey, U.S. Geological Survey, July 11, 1990.
Date:July 11, 1990 12:00 AM
Photographer:McGimsey, R.
Griggs, KatmaiVolcano
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Caption:Near-vertical view of the east Ukinrek Maar crater, 300 m (980 ft) across, that formed in 1977 during a 10-day phreatomagmatic eruption in the Becharof National Wildlife Refuge on the Alaska Peninsula. Part of smaller west Ukinrek Maar crater is visible at upper left. Photograph by D. Dewhurst, U.S. Fish and Wildlife Service, July 8, 1990.
Date:July 8, 1990 12:00 AM
Photographer:Dewhurst, D.
Ukinrek MaarsLake, Maar/tuff cone/tuff ring
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Caption:Redoubt Volcano, 3,108 m (10, 197 ft) high, is one of the active volcanoes of the Cook Inlet region. Steam and volcanic gas rise above the summit of the volcano following the 1989 to 1990 eruptions. View is to the west. Photograph by C. Gardner, U.S. Geological Survey, July 6, 1990.
Date:July 6, 1990 12:00 AM
Photographer:Gardner, C. A.
RedoubtSteam, Volcano
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Caption:Aerial view, looking southwest, of the Drift River valley following the 1989 to 1990 eruptions of Redoubt Volcano. Two bedrock islands (informally called the "Dumbbell Hills ") are visible at bottom center. Lahar deposits cover the valley floor. Photograph by C. Gardner, U.S. Geological Survey, June 28, 1990.
Date:June 28, 1990 12:00 AM
Photographer:Gardner, C. A.
RedoubtDebris flow/mudflow/landslide/lahar
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Caption:Redoubt Volcano. The Upper Drift River Valley is in the foreground.
Date:June 28, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtStratovolcano, Volcano
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Caption:Final lava dome of the 1989 to 1990 series of eruptions of Redoubt Volcano as it appeared approximately one year after the end of the eruption. It measures approximately 350 to 400 m (980 to 1,300 ft) across and represents an estimated 10 million cubic meters (353 million cubic feet) of material. By the time this photograph was taken, snow had accumulated on the cooling lava blocks. Locally, hydrothermal activity continued to produce intermittent steam plumes. View is to the south. Photograph by Game McGimsey, U.S. Geological Survey, June 21, 1990.
Date:June 21, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtDome
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Caption:Where exposed by subsequent stream downcutting, lahar deposits from the 1989 to 1990 eruptions of Redoubt Volcano consisted of layers of sand- to boulder-sized debris. Cynthia Gardner measuring deposit thickness. Photograph by G. McGimsey, U.S. Geological Survey, June 15, 1990.
Date:June 15, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtDebris flow/mudflow/landslide/lahar, Fieldwork operations, People in action
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Caption:Pyroclastic-flow deposits from the April 15 (lower two thirds of section) and April 21 (upper one third of section), 1990 eruptions of Redoubt Volcano exposed in a gully along the western margin of the piedmont lobe of Drift glacier. Shovel at base of section shows scale. Photograph by C. Neal, U.S. Geological Survey, June 7, 1990.
Date:June 7, 1990 12:00 AM
Photographer:Neal, C. A.
RedoubtDebris flow/mudflow/landslide/lahar, Fieldwork operations
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Caption:At the summit of 2,135-m (7,005 ft)-high Mount Douglas volcano on the northeastern tip of the Alaska Peninsula is a warm and highly acidic crater lake approximately 160 m (525 ft) wide. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
DouglasCaldera/crater, Lake, Stratovolcano, Volcano
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Caption:Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta volcano in June, 1912, is a steep-walled, 1.5-km (1 mi)-diameter crater that truncates a formerly 2,290-m (7,513 ft)-high stratovolcano. The caldera is partially filled by a blue-green lake about 250 m (820 ft) deep. The lake level was still rising when last measured in the mid-1970's. The multiple peaks of Trident Volcano are at top left. The lava dome of Novarupta volcano, which marks the site of the 1912 eruption, is visible at top, center. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
Katmai, Novarupta, TridentCaldera/crater, Dome, Lake, Stratovolcano, Volcano
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Caption:A symmetrical apron of pyroclastic debris extends from the summit of 1,282-m (4,206 ft)-high Augustine Volcano to sea level. The western shore of Cook Inlet can be seen in the distance. View is to the west. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
AugustineDebris flow/mudflow/landslide/lahar, Volcano
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Caption:Aerial view of the four-peaked, 2,165-m ( 7,103 ft)-high Mount Mageik volcano at the head of the Valley of Ten Thousand Smokes. Lava flows from Trident Volcano are ponded against the base of Mount Mageik at lower right. Martin volcano, with a gaping summit crater, is visible beyond and to the left of Mount Mageik along the topographic crest. View is to the west. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
Martin, MageikCaldera/crater, Volcano
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Caption:Nestled within a summit depression of 2,165-m ( 7,103 ft)-high Mount Mageik volcano is an acidic, hot (70 oC [158 oF]) crater lake. Persistent, vigorous fumaroles are present. No historical eruptions from Mount Mageik have been confirmed. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
MageikCaldera/crater, Fumarolic activity, Lake, Steam, Volcano
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Caption:View of the summit crater of 1,863-m (6,112 ft)-high Mount Martin volcano, a largely ice-covered stratovolcano at the southern end of the Katmai group. Note the sulfur (yellow) that has been deposited on the snow- and ice-covered crater walls. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
MartinCaldera/crater, Fumarolic activity, Stratovolcano, Volcano
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Caption:Southeast wall of the eastern Ukinrek Maar crater. The rhythmically layered, dark gray material visible in the wall consists of more than 15 m (50 ft) of phreatomagmatic tephra. The 1977 tephra sits on an exposure of glacial till capping ash-flow deposits from Ugashik Caldera. The lake has filled the original crater to a depth of more than 30 m (100 ft). In the distance at very top of photograph are debris-avalanche hummocks from an unknown source near the current site of Peulik volcano. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
Ukinrek MaarsLake, Maar/tuff cone/tuff ring, Stratigraphic section, Tephra
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Caption:Geologist John Ewert uses a theodolite to measure the dimensions of the lava dome at Redoubt Volcano. From the same installation, scientists also utilized a laser-ranging device to measure distances to reflectors. Repeated measurements of these distances allow for detection of ground deformation that may be related to volcanic activity.
Date:June 4, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtDome, Fieldwork operations, People in action, Volcano
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Caption:Redoubt volcano viewed from Gorby's summit photo station
Date:June 4, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtCaldera/crater, Steam, Stratovolcano, Volcano
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Caption:Douglas Volcano
Date:June 4, 1990 12:00 AM
Photographer:Casadevall, Tom
DouglasCaldera/crater, Lake, Volcano, Stratovolcano
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Caption:Kaguyak Volcano
Date:June 4, 1990 12:00 AM
Photographer:Neal, Tina
KaguyakVolcano, Stratovolcano, Caldera/crater, Lake
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Caption:Serpent Tongue Glacier on Mt. Snowy
Date:June 4, 1990 12:00 AM
Photographer:Neal, Tina
SnowyGlacier
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Caption: Peulik and Ugashik Caldera, 1990. View south from Kejulik.
Date:June 4, 1990 12:00 AM
Photographer:Neal, Christina
PeulikCaldera/crater, Stratovolcano, Volcano
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