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ImageDetailsVolcanoesKeywords
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Caption:Bob Symonds measuring fumarole temperatures at the summit of Augustine Volcano.
Date:August1992 12:00 AM
Photographer:Doukas, M. P.
AugustineFieldwork operations, Fumarolic activity, People in action, Volcano
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Caption:Debris avalanche deposits from the 1883 eruption of Augustine Volcano form small hills and islets at Burr Point on the north shore of Augustine Island. Photograph by S. McNutt, Geophysical Institute, University of Alaska, July 31, 1992.
Date:July 31, 1992 12:00 AM
Photographer:McNutt, S. R.
AugustineDebris flow/mudflow/landslide/lahar, People in action
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Caption:View onto the floor of the caldera from the southeast rim of Aniakchak caldera. Two explosion craters (maar craters) partially filled with seasonal meltwater are visible. The craters were formed by explosions through older lava flows from Vent Mountain, an intracaldera stratocone. Photograph by R. McGimsey, U.S. Geological Survey, June 29, 1992.
Date:July 29, 1992 12:00 AM
Photographer:McGimsey, R. G.
AniakchakCaldera/crater, Lake, Maar/tuff cone/tuff ring, Stratovolcano, Volcano
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Caption:Geologist samples columnar jointed lava in Half Cone wall at Aniakchak caldera
Date:July 7, 1992 12:00 AM
Photographer:McGimsey, R. G.
Aniakchak, Half ConeCaldera/crater, Lava flow, People in action
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Caption: Aniakchak 1992. Keri Petersen stands below the jointed columnar lava flows that compose the west wall of Half Cone. Photograph courtesy of Game McGimsey.
Date:July 7, 1992 12:00 AM
Photographer:McGimsey, R. G.
Aniakchak, Half ConeVolcano, Lava flow
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Caption: Aniakchak 1992. Keri Petersen stands below the jointed columnar lava flows that compose the west wall of Half Cone. Photograph courtesy of Game McGimsey.
Date:July 7, 1992 12:00 AM
Photographer:McGimsey, R. G.
Aniakchak, Half ConeVolcano, Lava flow
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Caption:Jointing on surface of Vulcan Dome, lava, Aniakchak caldera
Date:July 6, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Vulcan DomeCaldera/crater, Dome, Lake
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Caption:Jointing in lava flow near top of Bolshoi Dome, Aniakchak caldera
Date:July 6, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Bolshoi DomeCaldera/crater
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Caption:Friable, frothy, columnar jointed pumiceous outcrop near Surpise Lake. Possible surface texture of a subaqueously emplaced lava dome ("pumice dome"), Aniakchak caldera.
Date:July 6, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Surprise LakeCaldera/crater
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Caption:Headwaters of drainage into Surprise Lake, seeping from Half Cone pfyroclastic flows, Aniakchak caldera
Date:July 6, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Half Cone, Surprise LakeCaldera/crater
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Caption:Bishop Springs, 24.7 degrees C, carbon dioxide discharge, Aniakchak caldera
Date:July 6, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater, Fieldwork operations, People in action
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Caption:Smaller maar, Aniakchak caldera
Date:July 5, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater, Maar/tuff cone/tuff ring
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Caption:South end of big maar, Aniakchak caldera
Date:July 5, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater
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Caption:Small lake-filled maar, Aniakchak Caldera. Photograph courtesy of Game McGimsey.
Date:July 5, 1992 12:00 AM
Photographer:McGimsey, R. G.
AniakchakCaldera/crater, Lake, Lava flow, Volcano
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Caption:Weather clouds cascade over the south wall of Aniakchak caldera, a common occurrence that can portend bad weather. Photograph by C. Neal, U.S. Geological Survey, July 3, 1992.
Date:July 3, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater
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Caption:Top of Surprise Cone, Aniakchak caldera
Date:July 3, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater
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Caption:Top of Surprise Cone, Aniakchak caldera
Date:July 3, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater
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Caption:Aniakchak caldera. View of The Gates from the summit of Surprise Cone.
Date:July 3, 1992 12:00 AM
Photographer:Neal, C. A.
AniakchakCaldera/crater
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Caption:Mount Spurr Volcano six days after the June 27, 1992 eruption of its Crater Peak vent (darkened, steaming cone at lower left). The tephra fall and ash cloud traveled almost due north from Crater Peak, darkening the glacier-covered true summit of Mount Spurr (steaming peak at right) and dusting climbing routes on Denali in the Alaska Range. Crater Peak erupted two more times in the summer of 1992. Spurr is the closest volcano to Alaska's largest city of Anchorage - only 80 miles east of the volcano.
Date:July 3, 1992 12:00 AM
Photographer:Miller, T. P.
SpurrCaldera/crater, Glacier, Stratovolcano, Volcano
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Caption:Tina Neal and Olga Braitseva (visiting Russian volcanologist) examine a section of surge deposits from Half Cone, Aniakchak Caldera
Date:July 3, 1992 12:00 AM
Photographer:McGimsey, R. G.
Aniakchak, Half ConeCaldera/crater, Debris flow/mudflow/landslide/lahar, Fieldwork operations, People in action, Volcano
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Caption:Geologists examines pumice and bombs in west wall of Half Cone in Aniakchak caldera
Date:July 2, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Half ConeCaldera/crater
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Caption:View of the cross section of Half Cone, a postcaldera vent now exposed against the north wall of Aniakchak caldera. Within this cliff face are recorded several episodes of lava flows (dark rock outcrops), plinian eruption (lighter colored deposits at left), and spatterfed-flow accumulation (reddish layers). Photograph by R. McGimsey, U.S. Geological Survey, July 1, 1992.
Date:July 1, 1992 12:00 AM
Photographer:McGimsey, R. G.
AniakchakCaldera/crater, Lava flow
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Caption:Half Cone in Aniakchak caldera
Date:July 1, 1992 12:00 AM
Photographer:Neal, C. A.
Aniakchak, Half ConeCaldera/crater
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Caption:Yunaska Island, looking west, ridge is formed of four coalescing volcanoes. Summit lakes occur on two of them. The knobs in the foreground are remnants of an older volcano called Middle Mountain.
Date:July1992 12:00 AM
Photographer:Myers, J. D.
YunaskaCinder cone, Shield volcano, Stratovolcano, Volcano
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Caption:Yunaska Island, east looking view of Coats Caldera. Post-caldera cone on left, in center far caldera wall, and on right, a young lava flow that has breached the caldera wall. The Islands of the Four Mountains are visible in the background of the image - Carlisle on the right, Cleveland is on the left.
Date:July1992 12:00 AM
Photographer:Myers, J. D.
YunaskaCaldera/crater, Cinder cone, Lava flow
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