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Caption:AVO geologists Janet Schaefer and Kristi Wallace visit Unalaska and Dutch Harbor, to meet with the community and talk about ashfall from the recent Bogoslof eruption. In this image, Kristi is also taking the opportunity to sample ashfall from the January 31, 2017 explosion.
Date:February 17, 2017 12:00 AM
Photographer:Schaefer, Janet
BuldirFieldwork operations, People in action
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Caption:AVO geologists Janet Schaefer and Kristi Wallace visit Unalaska and Dutch Harbor, to meet with the community and talk about ashfall from the recent Bogoslof eruption. Here they are measuring and sampling ash deposits from Bogoslof that fell on Dutch Harbor/Unalaska on January 31, 2017.
Date:February 17, 2017 12:00 AM
Photographer:Schaefer, Janet
BuldirFieldwork operations, People in action
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Caption:AVO geologists Janet Schaefer and Kristi Wallace visit Unalaska and Dutch Harbor to meet with the community and talk about ashfall from the recent Bogoslof eruption. They also installed an air quality monitoring instrument (pictured here).
Date:February 17, 2017 12:00 AM
Photographer:Schaefer, Janet
BuldirFieldwork operations, People in action
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Caption:Steaming Pavlof volcano and Pavlof Sister. Photo courtesy of James McKinney aboard the NOAA ship Oscar Dyson.
Date:February 13, 2017 1:48 PM
Photographer:McKinney, James
Pavlof, Pavlof SisterSteam
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Caption:Steam from the summit of Pavlof volcano. Images taken by Michael Levine, Commanding Officer of NOAA ship Oscar Dyson in Pavlof Bay, Feb. 13, 2017.
Date:February 13, 2017 1:30 PM
Photographer:Levine, Michael
PavlofSteam
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Caption:Steaming from the summit of Pavlof volcano on February 13, 2017. Photo taken from NOAA ship Oscar Dyson, approximately 25 km (16 miles) south of Pavlof.
Date:February 13, 2017 9:28 AM
Photographer:McKinney, James
PavlofSteam
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:Features and deposits on Bogoslof Island as of February 12, 2017. Based on analysis of this image, it appears that no significant pyroclastic deposits were emplaced on the island during eruptive activity between January 31 and February 12, 2017. The main changes since January 31 (the date of the last high-resolution satellite view of the island) are primarily a result of wave erosion and enlargement of the shallow seawater lake in the center of the island. The Bogoslof Island landscape will continue to be modified by ocean waves, and further changes in the configuration of the island are likely. ©2017 Digital Globe NextView License. Base image Worldview-2, 2/12/2017.
Date:February 12, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is an expanded view of vesicles of the crystal-rich ash particle shown on image #104971. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a low magnification image showing major morphological types of ash particles. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. The angular ash particle in the middle is an amphibole crystal. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:Digital elevation model (DEM) and satellite image of Bogoslof Island, February 12, 2017. The DEM was generated by Angie Diefenbach, USGS, Cascades Volcano Observatory from stereo WorldView satellite images. Image data provided under Digital Globe NextView License.
Date:February 12, 2017 12:00 AM
Photographer:waythomas, chris
ArrayMaar/tuff cone/tuff ring, Seamount/ submarine volcano
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a plagioclase crystal with a thin coat of vesicular glass on top of it. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is an individual plagioclase crystal. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:Changes in the configuration of Bogoslof Island resulting from the ongoing 2016-17 eruption. The January 30-31, 2017 eruptive activity generated roughly 0.4 square kilometers of new land and as of January 31, 2017, the island area was 1.02 square kilometers, roughly three times the size of the pre-eruption island. Since then the area of the island has declined slightly due to wave erosion and expansion of the shallow seawater lake in the middle of the island. Eruptive activity since January 31 does not appear to have contributed much if any new pyroclastic fall and flow (surge) deposits to the island. If no new eruptive material is added to the island, wave action will begin to gradually erode the outer coastline.
Date:February 12, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, crystal-rich ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, glassy ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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Caption:SEM image of volcanic ash from January 31, 2017 eruption of Bogoslof Volcano. This is a vesicular, crystal-rich ash particle. The sample was collected in Dutch Harbor, ca. 60 miles to the east from the volcano by Ginny Hatfield. SEM image was acquired using JEOL JXA-8530f electron microprobe at the Advanced Instrumentation Laboratory of the University of Alaska Fairbanks.
Date:February 12, 2017 12:00 AM
Photographer:Izbekov, Pavel
Bogoslof
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