{"id":31215,"date":"2018-12-24T13:59:15","date_gmt":"2018-12-24T13:59:15","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=31215"},"modified":"2018-12-25T03:29:28","modified_gmt":"2018-12-25T03:29:28","slug":"eruption-of-mount-etna-in-italy","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/31215","title":{"rendered":"Eruption of Mount Etna in Italy"},"content":{"rendered":"<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_noaa20_suomiNPP_viirs_truecolor_Etna_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_noaa20_suomiNPP_viirs_truecolor_Etna_anim.gif\" alt=\"VIIRS True Color RGB images from NOAA-20 (at 1110 and 1220 UTC) and Suomi NPP (at 1200 UTC) [click to enlarge]\" width=\"640\" height=\"356\" \/><\/a><p class=\"wp-caption-text\">VIIRS True Color RGB images from NOAA-20 <em>(at 1110 and 1220 UTC)<\/em> and Suomi NPP <em>(at 1154 UTC)<\/em> [click to enlarge]<\/p><\/div>A sequence of VIIRS True Color Red-Green-Blue (RGB) images from NOAA-20 and Suomi NPP viewed using <a href=\"http:\/\/realearth.ssec.wisc.edu\"><strong>RealEarth<\/strong><\/a> <em><strong>(above)<\/strong> <\/em>showed the volcanic ash plume from an eruption of Mount Etna in Italy on 24 December 2018.<\/p>\n<p>A toggle between NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 \u00b5m) images<em><strong> (below)<\/strong><\/em> revealed a colder cloud plume at higher altitude along the southern edge of the tan\/brown volcanic ash plume. A thermal anomaly or &#8220;hot spot&#8221; <em>(dark black pixels)<\/em> could be seen at the snow-covered volcano summit.<\/p>\n<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_1250utc_noaa20_viirs_truecolor_infrared_Etna_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_1250utc_noaa20_viirs_truecolor_infrared_Etna_anim.gif\" alt=\"NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 \u00b5m) images at 1250 UTC [click to enlarge]\" width=\"640\" height=\"356\" \/><\/a><p class=\"wp-caption-text\">NOAA-20 VIIRS True Color RGB and Infrared Window <em>(11.45 \u00b5m)<\/em> images at 1250 UTC [click to enlarge]<\/p><\/div>The volcanic plume could be quantitatively analyzed using Suomi NPP VIIRS Ash Probability, Ash Height, Ash Loading and Ash Effective Radius products from the <a href=\"http:\/\/volcano.ssec.wisc.edu\"><strong>NOAA\/CIMSS Volcanic Cloud Monitoring<\/strong><\/a> site at 1154 UTC<em><strong> (below)<\/strong><\/em>.<\/p>\n<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_1154utc_suomiNPP_viirs_ashProbability_ashHeight_ashLoading_ashEffectiveRadius_Etna_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_1154utc_suomiNPP_viirs_ashProbability_ashHeight_ashLoading_ashEffectiveRadius_Etna_anim.gif\" alt=\"Suomi NPP VIIRS Ash Probability, Ash Height, Ash Loading and Ash Effective Radius at 1154 UTC [click to play enlarge]\" width=\"640\" height=\"526\" \/><\/a><p class=\"wp-caption-text\">Suomi NPP VIIRS Ash Probability, Ash Height, Ash Loading and Ash Effective Radius at 1154 UTC [click to play enlarge]<\/p><\/div>Since the bulk of the volcanic plume was high in ash content with minimal water or ice cloud, a good signature was seen using Meteosat-11 Split Window (11-12 \u00b5m) Brightness Temperature Difference images <em><strong>(below)<\/strong><\/em>.<\/p>\n<div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_meteosat11_splitWindowBTD_Etna_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnaail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181224_met11_split_window_6.png\" alt=\"Meteosat-11 Split Window (11.12 \u00b5m) Brightness Temperature Difference images [click to play animation]\" width=\"639\" height=\"525\" \/><\/a><p class=\"wp-caption-text\">Meteosat-11 Split Window <em>(11.12 \u00b5m)<\/em> Brightness Temperature Difference images [click to play animation]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A sequence of VIIRS True Color Red-Green-Blue (RGB) images from NOAA-20 and Suomi NPP viewed using RealEarth (above) showed the volcanic ash plume from an eruption of Mount Etna in Italy on 24 December 2018. A toggle between NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 \u00b5m) images (below) revealed a colder cloud plume [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":31217,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23,78,53,45,49,48,9],"tags":[],"class_list":["post-31215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-meteosat","category-noaa-20","category-real-earth","category-redgreenblue-rgb-images","category-suomi_npp","category-viirs","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=31215"}],"version-history":[{"count":2,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31215\/revisions"}],"predecessor-version":[{"id":31218,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31215\/revisions\/31218"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/31217"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=31215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=31215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=31215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}