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Caption:Aerial view of Shishaldin Volcano, November 25, 2023. Photo courtesy of Brian Reedy.
Date:November 25, 2023 12:00 AM
Photographer:Reedy, Brian
ShishaldinFumarolic activity, Steam
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Caption:Annotated European Space Agency Sentinel-2 satellite imagery of Bogoslof Island (top: true color from bands 4,3,2; middle: false color from bands 8,4,3; bottom: short-wave infrared from bands 12, 8A, 4) showing no signs of volcanic unrest or signficiant surface changes since a seismic swarm that started on Oct 22 near the island has since subsided.
Date:November 23, 2023 10:30 PM
Photographer:Lubbers, Jordan
BogoslofVolcano
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Caption:Video of webcam imagery from Shishaldin ISLZ webcam showing continuous steaming during the day on 11/19/2023. Steam is being emitted both vertically out of the summit and laterally on the upper NE flank.
Date:November 19, 2023 12:00 AM
Photographer:Lubbers, Jordan
ShishaldinGas, Steam, Stratovolcano
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Caption:Animation of satellite radar imagery of the 2021-present eruption of Great Sitkin Volcano. The image sequence shows the summit crater of the of volcano just before the May 25, 2021 explosion, the new inner crater and deposits from that eruption, and then the slow growth of a large andesitic lava flow that has mostly filled the summit crater, spilled down the volcano's flanks, and progressively replaced the intracrater glacier to the east. The synthetic aperture radar (SAR) imagery captures the topographic changes and variability in surface properties (snow, ash, etc) over time. Animated GIF is imagery, approximately every 11 days, between 9 May 2021 to 8 November 2023. Imagery courtesy of Simon Plank (DLR).
Date:November 8, 2023 5:56 PM
Photographer:Dietterich, Hannah
Great Sitkin
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Caption:MODIS thermal infrared satellite image showing short plume moving west from Shishaldin (red arrow), Nov 2, 2023, 11:30 pm AKDT.
Date:November 3, 2023 7:30 AM
Photographer:Terra MODIS satellite,
ShishaldinEruption cloud/ plume/ column
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Caption:GOES-18 false color multispectral satellite image showing ash eruption from Shishaldin (red arrow) at 8:10 pm Nov 2 AKDT/4:10 am Nov 3, 2023, UTC. Satellite image product provided by the Regional and Mesoscale Meteorology Branch (RAMMB) at the Cooperative Institute for Research in the Atmosphere (CIRA) at Colorado State University.
Date:November 3, 2023 4:10 AM
Photographer:CIRA at Colorado State University; RAMMB NOAA NESDIS office
ShishaldinEruption cloud/ plume/ column, Tephra
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Caption:Shishaldin Volcano, November 2, 2023. Photo courtesy of Craig Walters.
Date:November 2, 2023 4:37 PM
Photographer:Walters, Craig
ShishaldinSteam
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Caption:Bulk ash deposit from Shishaldin Volcano. This deposit consists of ash from numerous explosions between the onset of eruptive activity in the beginning of July 2023 and when the sample was collected at the end of October 2023. Deposit was located on top of a water tower to the NW of downtown False Pass, AK.
Date:October 27, 2023 1:30 PM
Photographer:Cameron, Russell
ShishaldinTephra
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Caption:Alaska Volcano Observatory exhibit booth set up at Alaska Federation of Natives 2023 conference, October 18, 2023.
Date:October 18, 2023 12:00 AM
Photographer:Coombs, Michelle
ArrayPeople in action
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected in False Pass, AK, during event 11. Sample has a reverse-zoned olivine (light gray) in a microlitic (plagioclase, dark gray) vesicular matrix.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected near AVO station ISNN northeast of the volcano. Sample has a vesicular, glassy matrix with plagioclase (dark gray) and olivine (light gray).
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra collected on the south coast of Unimak Island and probably erupted from the 2023 Shishaldin eruption. Image shows a crystallized fine-grained plagioclase and oxide inclusion hosted in a vesicular and glassy host tephra.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected near AVO station ISNN northeast of the volcano. Sample has a vesicular, microlitic matrix with a normally zoned plagioclase (dark gray, top) and reversed zoned olivine (light gray, bottom right) phenocryst.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected in False Pass, AK, during event 10. Sample has a vesicular, glassy matrix with plagioclase (dark gray), olivine (light gray), and Fe-Ti oxide (white).
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected in False Pass, AK, during event 10. Sample has a vesicular, glassy matrix with plagioclase (dark gray) and olivine (light gray).
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected near AVO station ISNN northeast of the volcano. Sample has a vesicular, glassy matrix with plagioclase (dark gray) and olivine (light gray). A fine-grained crystalline inclusion is visible in the upper left.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected near AVO station ISNN northeast of the volcano. Sample has a vesicular, glassy matrix with plagioclase (dark gray) and olivine (light gray). Mineral in the center is an olivine with rounded melt inclusions.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra collected on the south coast of Unimak Island and probably erupted from the 2023 Shishaldin eruption. Image shows a plagioclase phenocryst with a highly sieved zone hosted in a vesicular and glassy host tephra.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Backscatter electron images (BSE) of polished sections of tephra erupted from Shishaldin in 2023 and collected near AVO station ISNN northeast of the volcano. Sample has a vesicular, glassy matrix with plagioclase (dark gray) and olivine (light gray). Minerals in the center of the image are euhedral and normally zoned olivine.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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Caption:Scanning electron microscope image of Shishaldin ash from Event 10 on September 15, 2023, collected near False Pass, Alaska.
Date:October 13, 2023 12:00 AM
Photographer:Loewen, Matt
ShishaldinTephra
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