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AVO IMAGE DATABASE
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Caption:Rapidly eroding shoreline of Bogoslof seen from the M/V Miss Alyssa.
Date:April 7, 2017 12:22 PM
Photographer:Read, Cyrus
Bogoslof
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Caption:Bogoslof Volcano seen from the M/V Miss Alyssa during attempted hydrophone deployment. Steam from the crater is seen in the center of the image.
Date:April 7, 2017 12:20 PM
Photographer:Read, Cyrus
BogoslofSteam
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Caption:Wide view of Bogoslof Volcano taken from the M/V Miss Alyssa.
Date:April 7, 2017 12:20 PM
Photographer:Read, Cyrus
BogoslofSteam
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Caption:Video of Bogoslof volcano from the M/V Miss Alyssa.
Date:April 7, 2017 12:00 AM
Photographer:Lyons, John
BogoslofFieldwork operations, Seamount/ submarine volcano, Steam, Volcano
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Caption:Comparison of laser diffraction particle size distributions of ashfall from the Jan 31st and March 8th 2017 eruptive events at Bogoslof, Alaska.
Date:March 24, 2017 12:00 AM
Photographer:Van Eaton, Alexa
BogoslofTephra
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Caption:Active fumaroles in the summit crater of Makushin volcano.
Date:March 23, 2017 6:00 PM
Photographer:Swangel, Travis
MakushinFumarolic activity
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Caption:MREP station maintenance by Unalaska resident, Travis Swangel. Station MREP is located on Unalaska Island and the site houses electronics for Makushin seismic stations and is the repeater site for Okmok data transmission.
Date:March 23, 2017 3:53 PM
Photographer:Swangel, Travis
MakushinFieldwork operations
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Caption:March 21, 2017 WorldView satellite image of Bogoslof Island. It is difficult to identify deposits associated with the most recent eruption on March 13 in this image and most of the surficial features evident are erosional. Rill erosion has begun to modify the southern part of the island and it is possible that deeper gullies will form if no new deposits are emplaced during future eruptive events. Image data provided under Digital Globe NextView License.
Date:March 21, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano
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Caption:Sample of volcanic ash from Bogoslof volcano on March 8, 2017 (Event # 36) collected by Trevor Shaishnikoff of Unalaska, AK. The ash was collected from the roof of the wheel house of the boat he was on near Cape Kovrizhka when the ashfall occurred at about 05:30 AM AKST.
Date:March 20, 2017 3:20 PM
Photographer:Wallace, Kristi
BogoslofTephra
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Caption:Comparison of Bogoslof Island before the 2016-17 eruption to March 11, 2017 configuration. As of March 7-8, 2017, there have been 36 eruptive events since Dec. 12, 2016. Main geographic points of reference are labelled in each image and point A is the same in both images. Image data provided under Digital Globe NextView License.
Date:March 15, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano, Tephra
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Caption:Bogoslof Volcano with significant steaming, as viewed from a flight from Atka, AK to Dutch Harbor, AK. Photo courtesy of Dave Eilertsen.
Date:March 13, 2017 2:02 PM
Photographer:Eilertsen, Dave
BogoslofSteam
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Caption:Worldview-2 satellite image of Bogoslof volcano collected on March 11, 2017 at 22:15 UTC (1:15 PM AKST). Eruptive activity on March 8 produced large changes in the shape and size of the island. The most active vent for the explosive activity is located under the water in the center of the island, and it was greatly enlarged by the March 8 event. The western coastline has grown, and a new vent was produced on the north shore of the island. Image data provided under Digital Globe NextView License.
Date:March 11, 2017 10:55 PM
Photographer:Schneider, Dave
Bogoslof
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Caption:Worldview satellite images of Bogoslof volcano collected on March 3 and March 11, 2017 showing changes to the island due to eruptive activity on March 8, 2017. The central lake that is the site of the underwater vent is greatly expanded, deposition of volcanic ash and blocks has expanded the island's west shoreline, and a new small vent was formed on the north shore of the island. Image data provided under the Digital Globe NextView License.
Date:March 11, 2017 12:00 AM
Photographer:Schneider, Dave
Bogoslof
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Caption:March 11, 2017 Worldview-2 satellite image of Bogoslof Island showing features and changes resulting from the March 7-8 eruption. A new vent developed on the northwest shore of the island adjacent to the lava dome that formed during the 1992 eruption. Most of the deposits on the surface appear fine grained and were likely emplaced by pyroclastic base surges. The surface of these deposits exhibit ripples, dunes and ballistic impact craters. The scalloped appearing shoreline of the intra-island lake is probably the result of groundwater related erosion (sapping) of the pyroclastic deposits as water refills the lake. Most or all of the water in the lake was likely expelled by the eruption column exiting the primary or other vents. The area of Bogoslof Island in this image is about 0.98 square kilometers. Image data provided under Digital Globe NextView License.
Date:March 11, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano
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Caption:Recent road cut along Summer Bay Pass Road near Unalaska exposing January 31, 2017 ashfall layer within the snow from Bogoslof volcano.
Date:March 10, 2017 12:00 AM
Photographer:Woodbridge, Abi
Bogoslof
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Caption:Photo of ashfall on the snow, Nateekin Bay near Unalaska about a week after the eruption of Bogoslof on January 31, 2017.
Date:March 8, 2017 3:51 PM
Photographer:Dietrick, Andy
BogoslofTephra
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Caption:Photo of ashfall on the snow, Nateekin Bay near Unalaska about a week after the eruption of Bogoslof on January 31, 2017.
Date:March 8, 2017 3:51 PM
Photographer:Dietrick, Andy
BogoslofTephra
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Caption:Photo of ashfall on the snow, Nateekin Bay near Unalaska about a week after the eruption of Bogoslof on January 31, 2017.
Date:March 8, 2017 3:51 PM
Photographer:Dietrick, Andy
BogoslofTephra
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Caption:Thermal infrared satellite image of the volcanic ash cloud (dark grey and red) at 12:15 UTC (3:15 AM AKST) on 8 March 2017. This cloud was at an altitude of at least 35,000 ft above sea level.
Date:March 8, 2017 12:15 PM
Photographer:Schneider, Dave
Bogoslof
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Caption:There were 220 volcanic lightning strokes detected by the WWLLN network from 8:13–10:34 UTC, during the March 8, 2017 eruption of Bogoslof volcano.
Date:March 8, 2017 10:33 AM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:Thermal infrared satellite image of the volcanic ash cloud (dark grey and red) at 09:45 UTC (12:45 AM AKST) on 8 March 2017. This cloud was at an altitude of at least 35,000 ft above sea level.
Date:March 8, 2017 9:45 AM
Photographer:Schneider, Dave
Bogoslof
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Caption:Seismic and infrasound data from the 8 March 2017 Bogoslof eruption sequence (#36). The top figure is 4.5 hours of seismic data from a station on Makushin Volcano, and the bottom figure is 4.5 hours of infrasound data from a station on Okmok Volcano. The eruption began at 07:36 UTC (7 March 22:36 AKST) and lasted approximately 3 hours. During the eruption, a cloud visible in satellite data was produced that reached at least 35,000 feet above sea level. Hundreds of lightning strokes were also produced during the course of the eruption, with the first detection at 08:13 UTC (23:13 AKST) and the last detection at 10:33 UTC (8 March 01:33 AKST). Infrasound produced by the eruption was initially dominated by discrete events, but changed to a more sustained signals with higher frequency energy around 09:28 UTC (8 March 00:28 AKST). This change may have occurred as tephra built up around the vent area, greatly reducing the influence of sea water on the eruption.
Date:March 8, 2017 7:36 AM
Photographer:Lyons, John
BogoslofCaldera/crater, Eruption cloud/ plume/ column, Infrasound, Lightning, Seamount/ submarine volcano, Tephra, Volcano
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Caption:Digital elevation model (DEM) and satellite image of Bogoslof Island, February 23, 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 23, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano
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Caption:Worldview-2 satellite images of Bogoslof Island, February 12 and 23, 2017. Between February 12-23, there were 5 eruptive events, but it is difficult to tell how much pyroclastic material may have been added to the island as a result of this activity. The main changes evident in the February 23 image are related to wave erosion of the outer coastline. Another feature not clearly evident in satellite images prior to February 23 is an area of low-level point source steaming and possible fumaroles in the low area near the southeastern sector of the enclosed lake. The differences in island area are probably not significant and are likely related to tide level. ©2017 Digital Globe NextView License. Base images Worldview-2, 2/12/2017 and 2/23/17.
Date:February 23, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofFumarolic activity, Maar/tuff cone/tuff ring
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Caption:February 19 Bogoslof eruption plume as seen from Unalaska Island, 53 miles ESE of Bogoslof volcano. Photo taken from helicopter during fieldwork by AVO geologists at 5:22PM, approximately 14 minutes after the start of the eruption.
Date:February 19, 2017 5:22 PM
Photographer:Schaefer, Janet
BogoslofEruption cloud/ plume/ column
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