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Caption:Analysis of shoreline changes at Bogoslof volcano due to eruptive activity. The base image is from 11 January 2017 and the shore line on 16 and 18 January 2017 are noted by the green and salmon dashed lines, respectively. Note that the 18 January analysis was conducted before the explosive event on that day.
Date:January 18, 2017 12:00 AM
Photographer:Angeli, Kim
Bogoslof
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Caption:Image of Bogoslof's 18 January 2017 eruption plume, as seen from Dutch Harbor, AK. Dutch Harbor is about 60 miles (98 km) east of Bogoslof. Image courtesy of Victor Fisher.
Date:January 18, 2017 12:00 AM
Photographer:Fisher, Victor
BogoslofEruption cloud/ plume/ column
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Caption:Image of Bogoslof's 18 January 2017 eruption plume, as seen from Dutch Harbor, AK. Dutch Harbor is about 60 miles (98 km) east of Bogoslof. Image courtesy of Victor Fisher.
Date:January 18, 2017 12:00 AM
Photographer:Fisher, Victor
BogoslofEruption cloud/ plume/ column
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Caption:A small eruption plume from the January 12 explosion at Bogoslof volcano punches through the ~12,000 ft asl cloud deck as seen in this MODIS satellite image. Note the shadow of the plume on the cloud top to the northwest.
Date:January 12, 2017 12:34 PM
Photographer:Schaefer, Janet
BogoslofEruption cloud/ plume/ column
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Caption:Worldview-2 satellite image of Bogoslof volcano collected on January 11, 2017. The vent for the numerous explosions is located underwater in the bay. Discoloration in the water is due to suspended sediment.
Date:January 11, 2017 12:00 AM
Photographer:Schneider, Dave
BogoslofVolcano
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Caption:Photo of Bogoslof Island taken by Dan Leary of Maritime Helicopters on 10 January 2017. View is to the north and an upwelling can be seen near the center of the southeast facing bay, possibly marking the approximate location of the shallow submarine vent.
Date:January 10, 2017 3:05 PM
Photographer:Leary, Dan
BogoslofSeamount/ submarine volcano, Volcano
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Caption:Photo of Bogoslof Island taken by Dan Leary of Maritime Helicopters on 10 January 2017. View is to the northwest and the active vent is likely submarine and in the center of the turbid bay open to the southeast.
Date:January 10, 2017 3:02 PM
Photographer:Leary, Dan
BogoslofSeamount/ submarine volcano, Tephra, Volcano
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Caption:Comparison of Bogoslof Island, 1998 to 2017 showing changes in the configuration of the island as a result of the ongoing 2016-17 eruption. Points A-D are the same in both photos. Direction of view is toward the north-northwest. Distance from A-C about 820 m (0.51 mi). Zone of upwelling and likely location of the active vent in center left of open embayment. 1998 photo courtesy of John Seese, National Marine Fisheries/NOAA. 2017 photo courtesy of Dan Leary, Maritime Helicopters.
Date:January 10, 2017 3:02 PM
Photographer:waythomas, chris
BogoslofMaar/tuff cone/tuff ring, Seamount/ submarine volcano, Volcano
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Caption:Annotated photograph of Bogoslof Island showing the cumulative effects of 2016-17 eruptive activity. A layer of fine muddy appearing ash drapes most of the landscape and covers pre-existing vegetation. The dashed line indicates the area excavated by explosive eruptive activity so far. A prominent zone of upwelling is probably the surface expression of a shallow submarine vent. Photograph taken by Dan Leary, Maritime Helicopters, January 10, 2017.
Date:January 10, 2017 12:00 AM
Photographer:waythomas, chris
BogoslofSeamount/ submarine volcano, Volcano
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Caption:Animated gif showing the path of the Jan. 8, 2017 volcanic cloud from the 22:30 AKST (09 Jan 07:30 UTC) eruption of Bogoslof volcano. Seen in GOES thermal images, the white plume in the center of the image detaches from the small island volcano and tracks northwest with the prevailing winds.
Date:January 8, 2017 10:01 PM
Photographer:Schaefer, Janet
BogoslofEruption cloud/ plume/ column
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Caption:Satellite image collected at 00:56 UTC on January 6, 2017 (4:56 pm AKST on January 5) showing the volcanic cloud from the eruption of Bogoslof volcano that began at 22:24 UTC (1:24 pm AKST) on January 5. The volcanic cloud is ice-rich and rose to an altitude of 30-35,000 ft above sea level. Low-altitude steam emissions from Bogoslof are also visible in this image.
Date:January 5, 2017 4:56 PM
Photographer:Schneider, Dave
ArrayEruption cloud/ plume/ column
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Caption:Thermal infrared satellite image collected at 3:36 pm AKST (00:36 UTC on 6 January) showing the volcanic cloud (within the black circle) from the eruption of Bogoslof volcano at 1:24 pm AKST (22:24 UTC). This cloud is likely composed of a mixture of volcanic ash particles (rock, minerals and glass fragments), ice, and volcanic gases such as sulfur dioxide. The estimated cloud altitude is about 30 to 35,000 ft (9.1 to 10.7 km) above sea level.
Date:January 5, 2017 3:36 PM
Photographer:Schneider, Dave
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: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 Bogoslof's eruption plume, January 5, 2017, as viewed from a flight out of Dutch Harbor. Photo courtesy of Kevin Wright.
Date:January 5, 2017 12:00 AM
Photographer:Wright, Kevin
BogoslofEruption cloud/ plume/ column
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Caption:Hazy conditions from an approaching dust cloud resuspended from the Katmai region on December 31, 2016. Photograph taken from Kodiak, AK. Ash from the 1912 eruption of Novarupta-Katmai becomes resuspended into dust clouds during high northwesterly winds during dry, snow-free months. Photograph taken from Mission Beach in Kodiak around sunset. Photograph courtesy of Stephen Bodnar.
Date:December 31, 2016 4:09 PM
Photographer:Bodnar, Stephen
Katmai, NovaruptaTephra
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Caption:Hazy conditions from an approaching dust cloud resuspended from the Katmai region on December 31, 2016. Photograph taken from Kodiak, AK. Ash from the 1912 eruption of Novarupta-Katmai becomes resuspended into dust clouds during high northwesterly winds during dry, snow-free months. Photograph taken from Mission Beach in Kodiak around sunset. Photograph courtesy of Stephen Bodnar.
Date:December 31, 2016 4:09 PM
Photographer:Wallace, Kristi
Katmai, NovaruptaTephra
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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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Page modified: December 2, 2016 10:12
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