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AVO IMAGE DATABASE
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ImageDetailsVolcanoesKeywords
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Caption:AVO’s Wyatt Mayo digs through the snowpack to install an infrasound sensor in Whittier. USGS photo by C. Read, February 9, 2021.
Date:February 9, 2021 12:00 AM
Photographer:Read, Cyrus
ArrayFieldwork operations, Infrasound
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Caption:Looking down into the snow pit where one of six infrasound sensors was installed at ground level on February 9, 2021. The pyramid shaped shield helps minimize wind noise. The conduit running from the sensor to the main power and data hub is at the top of the photo. Although the sensors can work if buried in snow, the signals will be attenuated as the snowpack consolidates, so periodic shoveling is required.
Date:February 9, 2021 12:00 AM
Photographer:Read, Cyrus
ArrayFieldwork operations, Infrasound
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Caption:AVO technician Malcolm Herstand works on the main power and data hub for the infrasound array in Whittier. USGS photo by C. Read, February 9, 2021.
Date:February 9, 2021 12:00 AM
Photographer:Read, Cyrus
ArrayFieldwork operations, Infrasound
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Caption:Narrow dark streaks of ash on top of snow extend >3 km from the crater of North Cerberus on Semisopochnoi Island. Clouds obscure much of the area in this image from 7 February 2021, but these ash streaks reveal that low-level explosive activity is taking place in the crater of North Cerberus.
Date:February 7, 2021 11:01 PM
Photographer:Dietterich, Hannah
Semisopochnoi
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Caption:Worldview-3 panchromatic satellite image of North Cerberus crater on Semisopochnoi island. Views into the crater are obscured by steam. No obvious ballistic deposits are visible close to the vent despite an ash deposit extending 3 km to the north.
Date:February 6, 2021 11:33 PM
Photographer:Loewen, Matt
ArrayCaldera/crater
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Caption:Worldview-3 satellite image of Semisopochnoi on February 6, 2021. A thin ash deposit is visible <3 km to the north of North Cerberus crater, which is filled with steam.
Date:February 6, 2021 11:33 PM
Photographer:Loewen, Matt
Array
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Caption:Looking south on a Raven air flight. ANC to DUT. Pavlof sister with shadows of Pavlof Sister in the back ground. Taken with iPhone Pro, 12/23/20 11:30am by Levi Musselwhite.
Date:December 23, 2020 11:30 AM
Photographer:Musselwhite, Levi
PavlofStratovolcano, Volcano
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Caption:Looking south on a Raven air flight. ANC to DUT. Emmons Lake, Mount Emmons and Emmons Caldera. Taken with iPhone Pro, 12/23/20 11:30am by Levi Musselwhite.
Date:December 23, 2020 11:30 AM
Photographer:Musselwhite, Levi
Emmons Lake Volcanic CenterCaldera/crater, Volcano
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Caption:Sunrise view of Pavlof and Pavlof Sister, December 12, 2020, from AVO's BLHA webcam.
Date:December 12, 2020 10:08 AM
Photographer:Alaska Volcano Observatory
Pavlof, Pavlof SisterJust for fun, Volcano
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Caption: Worldview-3 satellite image of the Korovin summit crater with typical steaming from the crater lake and no other unusual features.
Date:December 8, 2020 10:49 PM
Photographer:Loewen, Matt
KorovinCaldera/crater, Steam
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Caption:Steaming at Korovin Volcano, taken 12-08-2020, by Atka resident William Dushkin.
Date:December 8, 2020 11:44 AM
Photographer:Dushkin, William
KorovinSteam, Volcano
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Caption:Steaming at Korovin Volcano, taken 12/08/2020, by Atka resident William Dushkin.
Date:December 8, 2020 11:44 AM
Photographer:Dushkin, William
KorovinSteam, Volcano
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Caption:Steaming at Korovin, 12-08-2020. Taken by Atka resident William Dushkin.
Date:December 8, 2020 11:44 AM
Photographer:Dushkin, William
KorovinSteam, Volcano
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Caption:Steam puffing from the summit fumaroles at Makushin volcano, as viewed from the Skibowl turnaround through the saddle of Captain's Bay west ridge.
Date:December 2, 2020 5:56 PM
Photographer:Woodbridge, Abi
MakushinSteam
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Caption:Steam puffing from the summit fumaroles of Makushin volcano, as viewed from Summer Bay Cliff Rd, south side of Iliuliuk Bay.
Date:December 2, 2020 4:56 PM
Photographer:Woodbridge, Abi
MakushinSteam
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Caption:Water vapor plume from Korovin, December 1, 2020. Photo courtesy of William Dushkin.
Date:December 1, 2020 12:00 AM
Photographer:Dushkin, William
KorovinFumarolic activity, Steam
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Caption:Thin section of lava from the Cobweb Lava Flow, erupted from Aniakchak Peak ~400 years ago. The name "Cobweb" comes from B.R. Hubbard (1932), who called it the "Avernian Cobweb." According to Wes Hildreth (USGS), "The poisonous vapors of Avernus, Italy, killed many birds, and Hubbard witnessed the same at Aniakchak, which seems why he adopted this name." The video shows 3-5 mm wide aggregates of crystals suspended in a finer-grained groundmass of tiny crystals. The minerals under the cross-polarized light are plagioclase (gray/white), clinopyroxene (blues/reds/oranges), orthopyroxene (pale yellow-gray), and FeTi oxide minerals like magnetite and ilmenite (black). Most of the tiny minerals in the groundmass are plagioclase. They formed when the magma ascended to the surface and solidified as a lava. The larger minerals formed under higher temperatures (~850 C) deep underground.
Date:October 27, 2020 12:00 AM
Photographer:Browne, Brandon
AniakchakLava flow
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Caption:A WorldView-1 satellite image taken on October 26, 2020 (UTC; October 25 local time) shows the typical minor steam plume from the crater lake at the summit of Korovin Volcano. Imagery is panchromatic grayscale.
Date:October 26, 2020 1:53 AM
Photographer:Dietterich, Hannah
Korovin
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Caption:Sulfur dioxide (SO2) is a common volcanic gas that is released from magma within Earth’s upper crust. While SO2 is commonly released from Alaska’s active volcanoes, including Korovin, a recent increase in satellite detections of SO2 emissions from Korovin may be a sign of volcanic unrest. In sufficient quantity, SO2 can be readily measured from space due to its low quantity in background air. This image shows SO2 emissions from Korovin that were detected by the TROPOMI satellite sensor on October 26, 2020. In this image, the warmer colors represent larger quantities of SO2 measured within a column of atmosphere. These SO2 column densities are reported in Dobson Units (DU) where 1 DU = 2.85 x 10^-2 g of SO2/m^2. AVO will continue to monitor satellite detections of SO2 from Korovin, in combination with other volcano monitoring techniques, to evaluate ongoing activity at Korovin volcano.
Date:October 26, 2020 12:00 AM
Photographer:Lopez, Taryn
KorovinGas, Volcano
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Caption:Clear satellite views in Planet Labs imagery on October 19, 2020 show the typical minor steam plume from the crater lake at Korovin. This image also shows the nearby volcanoes to the south, Konia and Kliuchef. Their summit regions are snow covered with no visible fumaroles or other signs of activity.
Date:October 19, 2020 7:27 PM
Photographer:Dietterich, Hannah
Atka, Korovin
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Caption:Partly cloudy Worldview-2 image of Semisopochnoi with the North Cerebus crater rim just visible between clouds. The crater itself is filled with thick steam or clouds, but a narrow and diffuse possible gas plume is visible accross the image front North Cerebus to the east, consistent with westerly winds. Image is visible "RGB" bands.
Date:October 18, 2020 11:16 PM
Photographer:Loewen, Matt
SemisopochnoiSteam
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Caption:Kasatochi as seen from Alaska Airlines flight from Adak. Photo by pilot Steve Rhodes.
Date:October 18, 2020 6:41 PM
Photographer:Rhodes, Steve
Kasatochi
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Caption:Great Sitkin as seen from Alaska Airlines flight from Adak, October 18, 2020. Photo by pilot Steve Rhodes.
Date:October 18, 2020 6:36 PM
Photographer:Rhodes, Steve
Great Sitkin
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Caption:Iliamna Volcano and summit fumaroles, October 15, 2020. The Tuxedni glacier is visible on the left side of the image, as well as Redoubt Volcano in the background.
Date:October 15, 2020 3:24 PM
Photographer:Lyons, John
Iliamna, RedoubtFumarolic activity, Glacier, Stratovolcano, Volcano
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Caption:The fumarole fields on the eastern flank of Iliamna Volcano.
Date:October 15, 2020 2:59 PM
Photographer:Lyons, John
IliamnaFumarolic activity, Steam, Stratovolcano, Volcano
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Page modified: December 23, 2019 16:01
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