{"id":30775,"date":"2018-11-21T23:59:44","date_gmt":"2018-11-21T23:59:44","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=30775"},"modified":"2018-11-24T17:02:29","modified_gmt":"2018-11-24T17:02:29","slug":"eruption-of-mount-veniaminof-on-the-alaska-peninsula","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/30775","title":{"rendered":"Eruption of Mount Veniaminof on the Alaska Peninsula"},"content":{"rendered":"
\"GOES-17<\/a>

GOES-17 “Red” Visible (0.64 \u00b5m)<\/em> and Split Window Difference (10.3-12.3 \u00b5m)<\/em> images [click to play MP4 animation]<\/p><\/div>\n

* GOES-17 images posted here are preliminary and non-operational *<\/em>
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Following an eruption of Mount Veniaminof<\/strong><\/a> on 21 November 2018, 1-minute Mesoscale Domain Sector<\/strong><\/a> GOES-17 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) and Split Window Difference (10.3-12.3 \u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> showed the volcanic ash plume drifting southeastward over the Gulf of Alaska. During the period 1947-2323 UTC the plume was seen to grow to a length of 200 miles from the volcano summit. Note in the Visible imagery that the 2625 ft (800 m) volcano acted as a barrier to the northwesterly boundary layer winds to create a cloud-free “notch” immediately downwind of Veniaminof.<\/p>\n

NOAA-20 VIIRS True Color RGB images viewed using RealEarth<\/strong><\/a> (below)<\/strong><\/em> highlighted the light brown color of the ash plume.<\/p>\n

\"NOAA-20<\/a>

NOAA-20 VIIRS True Color RGB images [click to enlarge]<\/p><\/div>A sequence of retrieved Ash Probability, Ash Height and Ash Loading (source<\/strong><\/a>) derived from Terra\/Aqua MODIS and Suomi NPP VIIRS data (below)<\/strong><\/em> indicated high probabilities of ash content, height values primarily in the 4-6 km range and ash loading exceeding 4 g\/m3 at times.<\/p>\n

\"Terra\/Aqua<\/a>

Terra\/Aqua MODIS and Suomi NPP VIIRS Ash Probability, Ash Height and Ash Loading images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div> 
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Spectacular @planetlabs<\/a> imaging of ash emissions from #Veniaminof<\/a> #volcano<\/a> (AK, USA) on November 21. @alaska_avo<\/a> @CIMSS_Satellite<\/a> @SanGasso<\/a> @NWSAnchorage<\/a><\/p>\n

Images Copyright 2018 Planet Labs Inc. pic.twitter.com\/jEziZMgrmu<\/a><\/p>\n

\u2014 Simon Carn (@simoncarn) November 22, 2018<\/a><\/p><\/blockquote>\n