{"id":66940,"date":"2025-09-22T23:59:00","date_gmt":"2025-09-22T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=66940"},"modified":"2025-09-26T19:44:14","modified_gmt":"2025-09-26T19:44:14","slug":"resuspended-ash-from-the-1912-eruption-of-novarupta-katmai-in-alaska","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/66940","title":{"rendered":"Resuspended ash from the 1912 eruption of Novarupta-Katmai in Alaska"},"content":{"rendered":"<p><div style=\"width: 1610px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/09\/250922_goes18_trueColorRGB_dustRGB_Katmai_resuspended_ash_anim.GIF\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/09\/GOES-18_ABI_RadF_true_color_night_dust_2025266_020021Z.png\" width=\"1600\" height=\"1000\" \/><\/a><p class=\"wp-caption-text\">GOES-18 daytime True Color RGB + nighttime Dust RGB images, from 1650 UTC on 22 September to 1000 UTC on 23 September [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/09\/250922_goes18_trueColorRGB_dustRGB_Katmai_resuspended_ash_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>10-minute Full Disk scan GOES-18 <em>(GOES-West)<\/em> daytime True Color RGB + nighttime <a href=\"https:\/\/rammb2.cira.colostate.edu\/wp-content\/uploads\/2020\/01\/Dust_RGB_Quick_Guide-1.pdf\"><strong>Dust RGB<\/strong><\/a> images created using <a href=\"https:\/\/www.ssec.wisc.edu\/software\/geo2grid\/\"><strong>Geo2Grid<\/strong><\/a> <em><strong>(above)<\/strong><\/em> showed a plume of resuspended volcanic ash (hazy shades of tan in True Color RGB, and shades of violet in Dust RGB) from the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Novarupta\"><strong>1912 Novarupta-Katmai<\/strong><\/a> eruption in Alaska \u2014 which was being transported offshore across the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Shelikof_Strait\"><strong>Shelikof Strait<\/strong><\/a> and over parts of Kodiak Island during 22-23 September 2025. Surface volcanic ash within the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Valley_of_Ten_Thousand_Smokes\"><strong>Valley Of Ten Thousand Smokes<\/strong><\/a> was being lofted by strong northwesterly winds that were being channeled through the valley.<\/p>\n<p>According to this <a href=\"https:\/\/volcanoes.usgs.gov\/hans-public\/notice\/DOI-USGS-AVO-2025-09-22T16:52:01+00:00\"><strong>USGS Volcano Notice<\/strong><\/a>, the National Weather Service issued a SIGMET advising aviation interests that the maximum height of this resuspended ash was 6000 ft.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>10-minute Full Disk scan GOES-18 (GOES-West) daytime True Color RGB + nighttime Dust RGB images created using Geo2Grid (above) showed a plume of resuspended volcanic ash (hazy shades of tan in True Color RGB, and shades of violet in Dust RGB) from the 1912 Novarupta-Katmai eruption in Alaska \u2014 which was being transported offshore across [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":66941,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,132,114,45],"tags":[],"class_list":["post-66940","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","category-geo2grid","category-goes-18","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66940","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=66940"}],"version-history":[{"count":13,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66940\/revisions"}],"predecessor-version":[{"id":67757,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66940\/revisions\/67757"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/66941"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=66940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=66940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=66940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}