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AVO IMAGE DATABASE
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Caption:AVO's John Lyons photographed this small rockfall event at Cleveland in late July 2014 during the field campaign to install the monitoring network. Notice the light-colored trail of dust rising above the path of volcanic debris that tumbled down the east flank of the volcano. We suspect these rockfalls come from steep, unstable piles of debris ejected during explosions earlier in the year. Folks in the field could hear the rocks rumble down the slope. Below the photograph are two ways of seeing rockfalls using seismic data from the new station CLES at the southeast base of the volcano. On top is the seismic waveform - here spanning 1 minute and 30 seconds from left to right - showing the typical spindle-shaped, emerging and slowly diminishing ground shaking signal seen during rockfalls in many settings. Below that is the same information in the frequency domain: warmer colors show higher amounts of energy at different frequencies contained within the waveform. Rockfalls show a mixture of high and low frequency content. Knowing this, we can detect these events from our offices far from the volcano. For more on interpreting spectrograms, see: http://pnsn.org/spectrograms/faq
Date:July 29, 2014 12:00 AM
Photographer:Lyons, John
ClevelandDebris flow/mudflow/landslide/lahar, Fumarolic activity, Stratovolcano, Volcano
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Caption:Summit overflight of Cleveland Volcano, Chuginadak Island during 2014 geological, geophysical and archeological field work. Carlisle and Herbert Volcanoes can be seen in the background. This video taken during the Islands of Four Mountains multidisciplinary project, funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 29, 2014 12:00 AM
Photographer:Lyons, John
ClevelandCaldera/crater, Fieldwork operations, Volcano
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Caption:Carlisle Volcano near sunset, as seen from Applegate Cove. The eternal Aleutian fog tendril drifts across the Bering. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 10:17 PM
Photographer:Neal, Christina
CarlisleStratovolcano
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Caption:A lazy plume of volcanic gas rises above the summit crater of Cleveland volcano. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 9:11 PM
Photographer:Fulton, Anne
ClevelandFumarolic activity, Stratovolcano
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Caption:Slinging an instrumentation enclosure off the Maritime Maid. Degassing Cleveland Volcano in the background. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 6:50 PM
Photographer:Neal, Christina
ClevelandEruption cloud/ plume/ column, Fieldwork operations, People in action, Stratovolcano, Volcano
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Caption:Cleveland volcano as seen from Applegate Cove. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 5:17 PM
Photographer:Neal, Christina
ClevelandFumarolic activity, Stratovolcano, Volcano
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Caption:Cleveland Volcano viewed from Applegate Cove on the north side of Chuginadak Island. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 4:35 PM
Photographer:Neal, Christina
ClevelandCinder cone, Eruption cloud/ plume/ column, Fieldwork operations, Stratovolcano, Volcano
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Caption:Summit and upper northeast flank of Cleveland volcano as seen from Applegate Cove. View is to the southwest. Note tan plume rising from the lower left marking the path of a rockfall. On this clear day, we observed a number of rockfalls in progress on the upper flank of the volcano. Some produced long-lasting wisps of vapor suggesting hot material falling on remnant snow in gullies. Note also small gas plume rising above the sumit crater. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 4:34 PM
Photographer:Neal, Christina
ClevelandDebris flow/mudflow/landslide/lahar, Fumarolic activity, Stratovolcano
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Caption:Cleveland and Carlisle volcanoes as seen from the eastern side of Applegate Cove, Chuginadak Island on a rare, glorious, sunny Aleutian day. Photo taken during the 2014 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Date:July 28, 2014 3:57 PM
Photographer:Fulton, Anne
Carlisle, ClevelandStratovolcano
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Caption:Scientists from the Islands of Four Mountains multidisciplinary science project, a program funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium, head ashore by skiff on the first day of fieldwork. For more information on this project, see: https://www.facebook.com/IslandsOfThe4Mountains/timeline
Date:July 28, 2014 2:52 PM
Photographer:Neal, Christina
ClevelandEruption cloud/ plume/ column, Stratovolcano
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Caption:Worldview-2 satellite image of the summit crater of Korovin, overlain on topography in Google Earth, showing the small lake that is frequently observed. View is from the east.
Date:July 28, 2014 12:00 AM
Photographer:Schneider, Dave
KorovinCaldera/crater, Lake, Volcano
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Caption:Worldview-2 satellite image overlain on topography in Google Earth, showing the northern portion of Atka Island with Korovin Volcano in the foreground. View is from the north
Date:July 28, 2014 12:00 AM
Photographer:Schneider, Dave
KorovinCaldera/crater, Volcano
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Caption:Worldview-2 satellite image of the summit crater of Korovin, overlain on topography in Google Earth, showing the small lake that is frequently observed. View is from the west.
Date:July 28, 2014 12:00 AM
Photographer:Schneider, Dave
Caldera/crater, Lake, Volcano
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Caption:Perspective satellite image view of Shishaldin Volcano from the west. Data is from the Advanced Land Imager aboard the EO-1 satellite. Base image is visible wavelength data and shortwave-infrared data is overlain in color showing the location of highly elevated surface temperatures in the summit crater. Snow and ice near the summit shows trace dusting of ash from low-level emissions. Dark streaks extending down the flanks from the summit are commonly observed during the summer at Shishaldin during non-eruptive periods and are not necessiarily related to the current low-level eruption.
Date:July 27, 2014 8:50 PM
Photographer:Schneider, Dave
ShishaldinVolcano
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Caption:Perspective satellite image view of Shishaldin Volcano from the northeast. Data is from the Advanced Land Imager aboard the EO-1 satellite. Base image is visible wavelength data and shortwave-infrared data is overlain in color showing the location of highly elevated surface temperatures in the summit crater. Snow and ice near the summit shows trace dusting of ash from low-level emissions. Dark streaks extending down the flanks from the summit are commonly observed during the summer at Shishaldin during non-eruptive periods and are not necessiarily related to the current low-level eruption.
Date:July 27, 2014 8:50 PM
Photographer:Schneider, Dave
ShishaldinVolcano
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Caption:Geyser along creek in Hot Springs valley.
Date:July 26, 2014 8:39 PM
Photographer:Coombs, Michelle
AkutanGeyser, Hot Springs, Volcano
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Caption:Akutan volcano from the NW on descent into Dutch Harbor.
Date:July 26, 2014 1:59 PM
Photographer:Kaufman, Max
AkutanCaldera/crater, Cinder cone
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Caption:Brian Jicha (University of Wisconsin-Madison) sampling youngest lava along north rim of Akutan caldera, with orange deposits of the 1,600-yr-B.P. caldera-forming eruption above.
Date:July 25, 2014 3:37 PM
Photographer:Coombs, Michelle
AkutanVolcano
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Caption:Photo of recent rockfall on Iliamna, taken at 2:16 pm AKDT on July 21, 2014 by Dennis Anderson.
Date:July 21, 2014 2:16 PM
Photographer:Anderson, Dennis
IliamnaAvalanche, Debris flow/mudflow/landslide/lahar, Glacier, Stratovolcano, Volcano
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Caption:A composite Landsat-8 image made by combining daytime visible wavelength data from July 19, 2014 with nighttime shortwave infrared (SWIR) data from July 21. This viewing perspective is from the southeast, and shows several small areas of enhanced SWIR emissions (the small colored squares) on the top of the intracaldera cone. The SWIR data are sensitive to high temperatures (hundreds of degrees Celsius) and highlight the persistently hot regions of the cone. Note that this is not eruptive activity, but rather a hot vent or cracks in the cone. The hot features are seen routinely in nighttime SWIR satellite images over the past months.
Date:July 21, 2014 8:00 AM
Photographer:Schneider, Dave
VeniaminofVolcano
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Caption:A composite Landsat-8 image made by combining daytime visible wavelength data from July 19, 2014 with nighttime shortwave infrared (SWIR) data from July 21. This viewing perspective is from the southeast, and shows several small areas of enhanced SWIR emissions (the small colored squares) on the top of the intracaldera cone. The SWIR data are sensitive to high temperatures (hundreds of degrees Celsius) and highlight the persistently hot regions of the cone. Note that this is not eruptive activity, but rather a hot vent or cracks in the cone. The hot features are seen routinely in nighttime SWIR satellite images over the past months.
Date:July 21, 2014 8:00 AM
Photographer:Schneider, Dave
VeniaminofVolcano
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Caption:Here is an image of Landsat-8 data of Cleveland collected on July 20, 2014 at 8:53 UTC. The shortwave-infrared (SWIR) data is in color, and shows elevated temperatures in the summit crater. The hottest pixel is about 300 degrees C. The SWIR data is overlain on thermal infrared data (in shades of grey: white is cold, black is hot), which shows low clouds obscuring the lower portion of the cone, and warm ground (black) around the crater. Note that the hottest region (shown in color) occupies a small portion of the summit crater.
Date:July 20, 2014 8:53 AM
Photographer:Schneider, Dave
ClevelandCaldera/crater
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Caption:Fresh rockfall on Iliamna's east side. Photo taken July 20, 2014, by Rick Stanley, USGS.
Date:July 20, 2014 8:29 AM
Photographer:Stanley, Rick
IliamnaAvalanche
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Caption:Shishaldin steams at sunrise, July 18, 2014.
Date:July 18, 2014 7:03 AM
Photographer:Alaska Volcano Observatory
ShishaldinSteam, Volcano
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Caption:Scenic Shishaldin steams at sunset, July 16, 2014.
Date:July 16, 2014 11:06 AM
Photographer:Alaska Volcano Observatory
ShishaldinSteam
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