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ImageDetailsVolcanoesKeywords
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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:Kaguyak volcano is lake-filled caldera, 2.5-km (1.5 mi) in diameter, that truncates a former stratovolcano. Postcaldera lava domes form a prominent peninsula (center) and a small island. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
KaguyakCaldera/crater, Dome, 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 which 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. Photograph by C. Neal, U.S. Geological Survey, June 4, 1990.
Date:June 4, 1990 12:00 AM
Photographer:Neal, C. A.
KatmaiCaldera/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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Caption:Douglas 1990. Photograph courtesy of Tom Casadevall.
Date:June 4, 1990 12:00 AM
Photographer:Casadevall, Tom
DouglasVolcano
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Caption:Lahars from the 1989 to 1990 eruptions of Redoubt Volcano inundated this structure near the mouth of Drift River, 35 km (22 mi) from the volcano. Photograph by C. Gardner, U.S. Geological Survey, June 1, 1990.
Date:June 1, 1990 12:00 AM
Photographer:Gardner, C. A.
RedoubtDebris flow/mudflow/landslide/lahar
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Caption:The south face of the final lava dome of the 1989 to 1990 series of eruptions of Redoubt Volcano as it appeared during the waning phases of eruption. A fractured lobe of blocky lava is visible at center. Steam from the interaction of meltwater with hot rock billows from the margins of the lava dome. Remnants of glacial ice with a coating of gray ash surround the dome. Photograph by C. Gardner, U.S. Geological Survey, June 1, 1990.
Date:June 1, 1990 12:00 AM
Photographer:Gardner, C. A.
RedoubtDome, Steam
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Caption:Ash and pumice covering alders at Two-Tree Knob near Redoubt Volcano. The ash is from the 1989 eruption of Redoubt.
Date:May 30, 1990 12:00 AM
Photographer:McGimsey, Game
RedoubtTephra
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Caption: Churchill Mountain Climb 1990. Photograph courtesy of Game McGimsey.
Date:May 24, 1990 12:00 AM
Photographer:McGimsey, Game
Churchill, MtVolcano, Caldera/crater, Tephra
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Caption:Tom Brigham and Game McGimsey of the U.S. Geological Survey climbing party reaching the east rim of the summit caldera on 4,766-m (15,636 ft)-high Mount Churchill, site of two of the most voluminous explosive eruptions in North America in the past 2,000 years. Blocky debris in the photo consists of pumice and lithic fragments ejected 1,250 years ago. This deposit forms the eastern lobe of the White River Ash. Photo by G. Dubois, U.S. Geological Survey, May 20, 1990.
Date:May 20, 1990 12:00 AM
Photographer:DuBois, G.
Churchill, MtCaldera/crater, Volcano
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Caption:Tom Brigham and Game McGimsey ascend to the caldera rim of Mt. Churchill, 9th highest peak in Alaska to confirm it as the source of the White River ash.
Date:May 20, 1990 12:00 AM
Photographer:DuBois, G.
Churchill, MtFieldwork operations, People in action, Volcano
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