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Caption:Timeline of historical eruptive events and observations at Bogoslof Island, 1768-present. Data for this figure obtained from AVO (www.avo.alaska.edu) and the Smithsonian Institute Global Volcanism Program (www.volcano.si.edu). Figure created by Chris Waythomas, USGS/AVO, January 5, 2017.
Date:January 5, 2017 12:00 AM
Photographer:waythomas, chris
Array
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Caption:Photograph of plume from Bogoslof Volcano, January 5, 2017. Photo courtesy of Trever Shaishnikoff.
Date:January 5, 2017 12:00 AM
Photographer:Shaishnikoff, Trever
BogoslofEruption cloud/ plume/ column
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Caption:Photograph of plume from Bogoslof Volcano, January 5, 2017. Photo courtesy of Trever Shaishnikoff.
Date:January 5, 2017 12:00 AM
Photographer:Shaishnikoff, Trever
BogoslofEruption cloud/ plume/ column
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Caption:Photograph of plume from Bogoslof Volcano, January 5, 2017. Photo courtesy of Trever Shaishnikoff.
Date:January 5, 2017 12:00 AM
Photographer:Shaishnikoff, Trever
BogoslofEruption cloud/ plume/ column
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Caption:31 volcanic lightning strokes were detected on Dec 31st 2016 from about 07:31–08:02 UTC (local time was evening of Dec 30th). Strokes indicated by lightning symbols; white circle shows a 20 km radius around Bogoslof.
Date:December 31, 2016 8:02 AM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:Map of Bogoslof Island showing changes in surface configuration as of Dec. 25, 2016. These changes are the result of the December 2016 eruptive activity. The map shows areas where new land area was generated by the emplacement of eruptive products, most likely volcanic ash, and areas of Bogoslof Island removed by the eruption. Worldview 3 satellite images obtained on March 19, 2015, and December 25, 2016 were used to make this map.
Date:December 29, 2016 12:00 AM
Photographer:waythomas, chris
BogoslofSeamount/ submarine volcano
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Caption:Helicorder record for seismic station OKER on Umnak Island, showing explosive eruptions on December 28 and 29 (AKST), 2016, from Bogoslof volcano. Station OKER is 53 km south of Bogoslof Island and is located on the rim of Okmok caldera. The two Bogoslof eruptions show up as continuous seismic signals, each lasting about 40 minutes. Also seen on this figure are regional earthquakes, calibration pulses, and a roughly 13-hour period of high wind. A 1-5 Hz filter has been applied to the seismic data in this image.
Date:December 28, 2016 10:00 AM
Photographer:Wech, Aaron
BogoslofEruption cloud/ plume/ column, Seismic/GPS installation
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Caption:Volcanic lightning detected at Bogoslof by the Worldwide Lightning Location Network (WWLLN). The network detected 27 strokes associated with the eruption on Dec 26th 2016 from about 23:35–23:56 UTC (2:35-2:56pm local time), drifting in a northeasterly direction. White circle shows a 20 km radius around Bogoslof.
Date:December 26, 2016 2:35 AM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:Satellite image collected at 00:50 UTC on 27 December (15:50 pm AKST on 26 December) showing the volcanic cloud (within the red arrows) from the eruption of Bogoslof volcano that began around 14:05 AKST (23:05 UTC) on 26 December. The ash cloud altitude is estimated at around 30,000 ft (7.1 km) above sea level.
Date:December 26, 2016 12:00 AM
Photographer:Schneider, Dave
BogoslofEruption cloud/ plume/ column
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Caption:Changes in shoreline location of Bogoslof Island due to explosive eruptive events of Bogoslof volcano in late December 2016 as determined by analysis of Worldview satellite images. The pre-eruption shoreline as seen in an image from July 29, 2011 is shown as a red line. The location of the shoreline from December 22 and 25 are shown in cyan and magenta, respectively. The vent for the eruption is presumably located underwater, just off the northeast portion of the main island. Explosive eruptions were detected in monitoring data on December 20, 21 and 23, 2016
Date:December 25, 2016 12:00 AM
Photographer:Angeli, Kim
BogoslofMaar/tuff cone/tuff ring, Volcano
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Caption:Photograph of Bogoslof's December 23, 2016 eruption, showing ash emission, lightning, and the ejection of incandescent lava and fragmental material. Photo taken on the morning of December 23, 2016, by the crew of the US Coast Guard Cutter Alex Haley. Photo used with permission from the USCG.
Date:December 23, 2016 12:00 AM
Photographer:US Coast Guard Alex Haley,
BogoslofEruption cloud/ plume/ column, Lightning
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Caption:Position of the dispersed sulfur dioxide cloud at 21:51 UTC (1:51 pm AST) from the eruption of Bogoslof volcano on December 21, 2016 (4:20 pm AST or 01:20 UTC on December 22). No ash was detected in the location of this cloud. Sulfur dioxide can typically be tracked for a longer time after an eruption as it is not removed from the atmosphere as quickly as volcanic ash. Image provided under the "The Support to Aviation Control Service (SACS)" project. http://sacs.aeronomie.be/
Date:December 22, 2016 1:51 PM
Photographer:Schneider, Dave
BogoslofEruption cloud/ plume/ column
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Caption:The World Wide Lightning Location Network (WWLLN) Volcanic Lightning Monitor detected 60 lightning strokes on Dec 22nd 2016 from 01:27–01:55 UTC (Dec 21st local time). Strokes indicated by lightning symbols; those in red have less accurate location/timing information. White circle shows a 20 km radius around Bogoslof.
Date:December 22, 2016 1:55 AM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:Analysis of shoreline change and vent location from the eruption of Bogoslof volcano. The base image was collected on March 19, 2015 and the analysis was conducted on data from December 22, 2016 after the large explosive eruption on December 21, 2016. Note that the location of the vent for the eruption was underwater or near the shoreline on the NE part of Bogoslof Island. Deposits have enlarged portions of the island and are interpreted to be comprised of coarse-grained volcanic ash and blocks of lava.
Date:December 22, 2016 12:00 AM
Photographer:Burton, Bill; Schneider, Dave
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano, Tephra, Volcano
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Caption:A plume rises from Bogoslof volcano, partially obscured by a mountain on Unalaska Island, in this view from Unalaska, about 60 miles east of the volcano, on Wednesday, Dec. 21, 2016. (Lynda Lybeck-Robinson / ADN reader submission)
Date:December 22, 2016 12:00 AM
Photographer:Robinson, Lynda
Bogoslof
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Caption:Satellite detection of an SO2 cloud from Bogoslof volcano, Alaska, detected by the IASI infrared satellite sensor on 22 December 2016 at 08:03 UTC (21 December 2016 11:03pm AKST). Color bar indicates the density of SO2 (DU) measured within a column of atmosphere. Image courtesy of the Support to Aviation Control Service (SACS) SO2 Alert system Belgian Institute for Space Aeronomy.
Date:December 21, 2016 11:03 PM
Photographer:Lopez, Taryn
BogoslofEruption cloud/ plume/ column
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Caption:Thermal infrared satellite image showing eruption cloud from the 01:20 UTC (4:20 pm AST) eruption of Bogoslof volcano. The image was from 01:48 UTC (4:48 pm AST) and the cloud top is approximately 30 km (20 miles) across.
Date:December 21, 2016 4:48 PM
Photographer:Schneider, Dave
BogoslofEruption cloud/ plume/ column
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Caption:Satellite image, with a red arrow pointing to the detached eruption cloud from Bogoslof, 4:15 pm December 20 AKST (01:15 am December 21 UTC). Bogoslof is the small dot circled in orange, in upper-center of the image. Yellow circle in lower-left surrounds Cleveland volcano. Thermal infra-red GOES satellite image.
Date:December 20, 2016 4:15 PM
Photographer:McGimsey, Game
BogoslofEruption cloud/ plume/ column
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Caption:This spectacular photo of Bogoslof's eruption plume was captured on Tuesday Dec. 20 at around 3:30 PM AKST at 36,000 feet. The aircraft was about 20 miles north of Bogoslof island flying westbound. Image courtesy of Paul Tuvman.
Date:December 20, 2016 3:30 PM
Photographer:Tuvman, Paul
BogoslofEruption cloud/ plume/ column
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Caption:Index map showing the location of Bogoslof Volcano. Adapted from Beget, J.E., Larsen, J.F., Neal, C.A., Nye, C.J., and Schaefer, J.R., 2005, Preliminary volcano-hazard assessment for Okmok Volcano, Umnak Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2004-3, 32 p., 1 sheet, scale 1:150,000.
Date:December 20, 2016 12:00 AM
Photographer:Alaska Volcano Observatory
Bogoslof
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Caption:The World Wide Lightning Location Network (WWLLN) Volcanic Lightning Monitor detected 21 lightning strokes on Dec 19th 2016 from 15:49–16:34 UTC. Strokes indicated by lightning symbols; white circle shows a 20 km radius around Bogoslof.
Date:December 19, 2016 4:34 PM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:The World Wide Lightning Location Network (WWLLN) Volcanic Lightning Monitor detected 5 lightning strokes on Dec 16th 2016 from 18:36–18:50 UTC. Strokes indicated by lightning symbols; white circle shows a 20 km radius around Bogoslof.
Date:December 16, 2016 6:50 PM
Photographer:Van Eaton, Alexa
BogoslofLightning
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Caption:Satellite image showing resuspended ash (blue area in the upper right) from the 1912 Novarupta eruption being carried southeast from the Katmai region towards Kodiak Island. AVHRR BTD, 02 Dec 2016 18:15 UTC
Date:December 2, 2016 6:15 PM
Photographer:Schaefer, Janet
Katmai, Novarupta
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Caption:DGGS Volcanology Section Staff, 2016. From left to right, Katie Mulliken, Janet Schaefer, Scott Crass, and Cheryl Cameron
Date:December 2, 2016 11:43 AM
Photographer:Schaefer, Janet
ArrayJust for fun, Non-volcanic, People in action
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Caption:Image of Mount Frosty, showing recent avalanche, taken by Happy Kremer, November 11, 2016.
Date:November 11, 2016 1:01 PM
Photographer:Kremer, Happy
FrostyAvalanche
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