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Caption:Annotated 24-hour webicorder display for station CKN at Mount Spurr Volcano on September 10, 2014. During a daily check of seismic data as the AVO duty seismologist, AVO geophysicist John Lyons noted the protracted, sudden onset signal that occurred just after 11:21 local time. He interpreted this as a likely outburst of water from beneath one of the glaciers that flow southward off Mount Spurr. AVO seismologists have seen other examples of this type of long-duration signal when high-discharge events have been seen in the field. Note how different this appears from a typical regional earthquake (at top) and the twice-daily station calibration pulses (at left).
Date:September 11, 2014 12:00 AM
Photographer:Lyons, John
SpurrGlacier outburst flood
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Caption:View from the Cleveland CLCO webcam, looking west-northwest from Concord Point, Chuginadak Island, to Cleveland. Cleveland is in the mid-distance center of the photo, Herbert to the far left, Carlisle to the far right, and the slopes of Tana are in view on the near right.
Date:September 1, 2014 8:03 AM
Photographer:Alaska Volcano Observatory
Stratovolcano
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Caption:Part of a ~6 m (20 feet) thick section of ash and lapilli falls from Cleveland and nearby volcanoes, exposed in a gully on the southeast flank of the volcano. We will be analyzing some of the ashes and soils from this section to begin to understand eruption frequency in the Islands of Four Mountains. Measuring tape is 1 m 3.3 feet) long. 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:August 15, 2014 1:51 PM
Photographer:Neal, Christina
Carlisle, Churchill, Mt, Herbert, TanaTephra
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Caption:Southeast flank of Carlisle 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:August 14, 2014 2:23 PM
Photographer:Fulton, Anne
CarlisleDome, Stratovolcano, Volcano
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Caption:Herbert volcano as seen from the coastline of Carlisle 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:August 14, 2014 12:01 PM
Photographer:Fulton, Anne
Carlisle, HerbertCaldera/crater, Stratovolcano
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Caption:As seen from Carlisle volcano, here is a common foggy view of Cleveland volcano and a puffing fumarolic plume drifting downwind from its summit. 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:August 14, 2014 11:58 AM
Photographer:Fulton, Anne
ClevelandFumarolic activity, Stratovolcano, Volcano
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Caption:Recent cauliflower bomb from Cleveland volcano on the southeast flank. 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:August 12, 2014 1:58 PM
Photographer:Neal, Christina
ClevelandBomb, Tephra
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Caption:Pavel Izbekov stands next to the hut at seismic station CLES at the southeast base 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:August 12, 2014 1:06 PM
Photographer:Neal, Christina
ClevelandFieldwork operations
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Caption:Mitsuru Okuno stands next to a sequence of young tephra falls atop coarse lahar deposits on the southeast coast of Carlisle 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:August 11, 2014 12:20 PM
Photographer:Neal, Christina
CarlisleTephra
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Caption:A view to the south from Carlisle volcano across ominous, windy, turbulent Carlisle Pass, a challenging body of water separating Carlisle and Cleveland volcanoes. The grass-covered northwest coastline of Cleveland is in the sun and the slope of little-known Herbert volcano is in the distance peeking out from the clouds. 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:August 11, 2014 9:52 AM
Photographer:Fulton, Anne
Carlisle, Cleveland, HerbertFieldwork operations, Stratovolcano
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Caption:Summit of Carlisle volcano seen from a helicopter on a misty day. Note the small patch of glacial ice just below the summit. 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:August 10, 2014 1:14 PM
Photographer:Neal, Christina
CarlisleGlacier, Stratovolcano, Volcano
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Caption:Lahar and block and ash flow channel on the north flank of Cleveland volcano. A small portion of Carlisle volcano is visible at upper left. 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:August 10, 2014 1:04 PM
Photographer:Neal, Christina
Carlisle, ClevelandDebris flow/mudflow/landslide/lahar, Pyroclastic flow, Stratovolcano, Volcano
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Caption:UAFGI/AVO geophysicist Max Kaufman installs a campaign GPS station on the north coast 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:August 10, 2014 12:49 PM
Photographer:Neal, Christina
ClevelandFieldwork operations
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Caption:Incandescence in the crater of Shishaldin Volcano.
Date:August 10, 2014 12:18 PM
Photographer:Read, Cyrus
Shishaldin
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Caption:Slinging gear to set up camp on Carlisle. Cleveland 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:August 10, 2014 10:51 AM
Photographer:Neal, Christina
ClevelandEruption cloud/ plume/ column, Fieldwork operations, Stratovolcano
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Caption:John Lyons and Max Kaufman amid pile of AVO gear after successful installation of two geophysical monitoring stations on 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:August 9, 2014 5:42 PM
Photographer:Neal, Christina
Cleveland, TanaFieldwork operations
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Caption:A bear checks out the GPS antenna in front of the Shishaldin webcam.
Date:August 8, 2014 4:36 PM
Photographer:Webcam, Shishaldin
ShishaldinSeismic/GPS installation
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Caption:Young landslide on the east coastline of little-studied Tana volcano. Tana forms the east portion of Chuginadak Island. An area of fumarolic activity, previously unreported, begins just to the north of this landslide at the top of the seacliff. If you zoom in to the coastline at the right margin of this image, you may see wisps of vapor from several of the point source fumaroles, marked by altered patches of ground. The fumaroles were first spotted by students Anne Fulton and Tom Barnett during a helicopter flight during the 2014 fieldwork. 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:August 7, 2014 5:56 PM
Photographer:Neal, Christina
TanaDebris flow/mudflow/landslide/lahar, Fumarolic activity, Stratovolcano, Volcano
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Caption:One of several point-source fumaroles on the eastern coastline of Tana volcano, a surprise find for the expedition. Geologists measured temperatures of up to 98C. 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:August 7, 2014 5:11 PM
Photographer:Fulton, Anne
TanaFumarolic activity
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Caption:Close up of a small bubbling hot spring on the eastern coastline of Tana volcano, one of the surprise finds of the season. Thermocouple temperatures of up to 98C were measured. 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:August 7, 2014 5:06 PM
Photographer:Fulton, Anne
TanaFumarolic activity, Geyser
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Caption:A breezy day aboard the Maritime Maid here holding off the north coast of Tana volcano (Chuginadak Island) where the sea was calm enough to allow helicopter operations. Panorama begins looking north at cloud-shrouded Kagamil Island and ends looking at coast of Tana. 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:August 7, 2014 12:00 AM
Photographer:Neal, Christina
Carlisle, Kagamil, Tana
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Caption:View from the Maritime Maid on one of our windiest days; occasional gusts reaching 80 - 100 mph smacked the boat as we hid in the lee of Tana volcano on the eastern shoreline of Chuginadak Island. Helicopter operations were not possible and the crew was ever-mindful to ensure that the ship was well-secured to the helideck. Towards the end of the storm, a complete rainbow appeared to the east. 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:August 6, 2014 12:00 AM
Photographer:Neal, Christina
TanaFieldwork operations
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Caption:One of a number of fumaroles discovered by the 2014 science team when flying the coastline of Tana Volcano. To our knowledge, these have not been reported previously. 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:August 5, 2014 8:11 PM
Photographer:Neal, Christina
TanaFumarolic activity, Volcano
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Caption:Cleveland Volcano from South Cove, Chuginadak Island. Photo taken from the deck of the R/V Maritime Maid 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:August 5, 2014 12:54 PM
Photographer:Neal, Christina
ClevelandEruption cloud/ plume/ column, Stratovolcano
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Caption:Cleveland and Carlisle volcanoes as seen from the western flank of Tana volcano atop a surface of scoria and bombs from nearby young cinder cones and explosion craters. 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:August 5, 2014 12:39 PM
Photographer:Fulton, Anne
Carlisle, ClevelandCinder cone, Eruption cloud/ plume/ column, Stratovolcano
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