{"id":162,"date":"2018-09-17T19:53:24","date_gmt":"2018-09-17T19:53:24","guid":{"rendered":"http:\/\/volcano.ssec.wisc.edu\/blog\/?p=162"},"modified":"2018-09-20T18:09:49","modified_gmt":"2018-09-20T18:09:49","slug":"2018-wmo-volcanic-ash-intercomparison-validation-for-grimsvotn-21-23-may-2011","status":"publish","type":"post","link":"https:\/\/volcano.ssec.wisc.edu\/blog\/2018\/09\/17\/2018-wmo-volcanic-ash-intercomparison-validation-for-grimsvotn-21-23-may-2011\/","title":{"rendered":"2018 WMO Volcanic Ash Intercomparison &#8212; validation for Gr\u00edmsv\u00f6tn (21-23 May 2011)"},"content":{"rendered":"<p>For the 2018 WMO Volcanic Ash Intercomparison, two experts at the University of Wisconsin independently identified volcanic clouds in multispectral infrared satellite imagery. Twenty times were selected for validation during this eruptive event. The images below show multispectral imagery with yellow and green polygons overlaid, representing the experts&#8217; analysis of where ash is present. Please share your thoughts on the quality of this manual validation analysis by commenting on this post (i.e., is this analysis comparable to where you believe there is and is not volcanic ash?).<\/p>\n<p>You can see the imagery for May 21-22 in this\u00a0<a href=\"https:\/\/volcano.ssec.wisc.edu\/imagery\/view\/#sector:North-Atlantic1::instr:all::sat:all::image_type:RGB1112um_8511um_11um::endtime:2011-05-22_23-45-00::daterange:2880\" target=\"_blank\" rel=\"noopener\">imagery viewer<\/a>.<\/p>\n<p>You can see the imagery for May 23 in this <a href=\"https:\/\/volcano.ssec.wisc.edu\/imagery\/view\/#sector:North-Atlantic1::instr:all::sat:all::image_type:RGB1112um_8511um_11um::endtime:2011-05-23_15-00-00::daterange:720\" target=\"_blank\" rel=\"noopener\">imagery viewer<\/a>.<\/p>\n<p><strong>21 May 2011<\/strong><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-245 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-15-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-246 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-15-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-15-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-15-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-15-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-30-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-247 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-30-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-30-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-30-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-30-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-45-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-248 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-45-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-45-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-45-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.22-45-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-249 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-15-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-250 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-15-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-15-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-15-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-15-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-30-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-251 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-30-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-30-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-30-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-30-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-45-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-252 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-45-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-45-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-45-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-21.23-45-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><strong>22 May 2011<\/strong><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.00-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-253 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.00-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.00-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.00-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.00-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.01-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-254 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.01-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.01-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.01-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.01-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.02-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-255 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.02-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.02-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.02-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.02-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.03-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-256 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.03-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.03-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.03-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.03-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.04-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-257 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.04-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.04-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.04-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.04-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.05-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-258 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.05-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.05-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.05-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.05-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.06-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-259 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.06-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.06-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.06-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.06-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.07-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-260 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.07-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.07-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.07-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.07-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.08-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-261 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.08-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.08-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.08-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.08-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.13-00-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-262 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.13-00-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.13-00-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.13-00-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-22.13-00-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><strong>23 May 2011 <\/strong>(<a href=\"https:\/\/volcano.ssec.wisc.edu\/imagery\/view\/#sector:North-Atlantic1::instr:all::sat:all::image_type:RGB1112um_8511um_11um::endtime:2011-05-23_15-00-00::daterange:720\">imagery viewer<\/a>)<\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.04-15-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-263 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.04-15-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.04-15-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.04-15-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.04-15-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.13-45-00.RGB8511_MANUAL.North-Atlantic1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-264 size-full\" src=\"http:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.13-45-00.RGB8511_MANUAL.North-Atlantic1.png\" alt=\"\" width=\"1000\" height=\"821\" srcset=\"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.13-45-00.RGB8511_MANUAL.North-Atlantic1.png 1000w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.13-45-00.RGB8511_MANUAL.North-Atlantic1-300x246.png 300w, https:\/\/volcano.ssec.wisc.edu\/blog\/wp-content\/uploads\/2018\/09\/Meteosat-9.SEVIRI.2011-05-23.13-45-00.RGB8511_MANUAL.North-Atlantic1-768x631.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For the 2018 WMO Volcanic Ash Intercomparison, two experts at the University of Wisconsin independently identified volcanic clouds in multispectral infrared satellite imagery. Twenty times were selected for validation during this eruptive event. The images below show multispectral imagery with yellow and green polygons overlaid, representing the experts&#8217; analysis of where ash is present. Please [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-162","post","type-post","status-publish","format-standard","hentry","category-wmo2018","entry"],"_links":{"self":[{"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/posts\/162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":7,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/posts\/162\/revisions"}],"predecessor-version":[{"id":292,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/posts\/162\/revisions\/292"}],"wp:attachment":[{"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/media?parent=162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/categories?post=162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/volcano.ssec.wisc.edu\/blog\/wp-json\/wp\/v2\/tags?post=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}