{"id":66575,"date":"2025-08-16T23:55:00","date_gmt":"2025-08-16T23:55:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=66575"},"modified":"2025-08-22T15:08:08","modified_gmt":"2025-08-22T15:08:08","slug":"resuspended-ash-from-the-1912-novarupta-katmai-eruption-3","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/66575","title":{"rendered":"Resuspended ash from the 1912 Novarupta-Katmai eruption"},"content":{"rendered":"<p><div style=\"width: 2010px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/08\/250815_250816_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\/08\/GOES-18_ABI_RadF_true_color_night_dust_2025229_024022Z.png\" width=\"2000\" height=\"1600\" \/><\/a><p class=\"wp-caption-text\">10-minute GOES-18 daytime True Color RGB and nighttime Dust RGB images, from 1430 UTC on 15 August to 0240 UTC on 17 August [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/08\/GOES-18_RadF_true_color_night_dust_2025227_143022_2025229_024022.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>10-minute Full Disk scan GOES-18 <em>(GOES-West)<\/em> daytime True Color RGB and 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 subtle shades of violet in Dust RGB images) from the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Novarupta\"><strong>1912 Novarupta-Katmai<\/strong><\/a> eruption in Alaska &#8212; which was being transported offshore across the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Shelikof_Strait\"><strong>Shelikof Strait<\/strong><\/a> and Kodiak Island, emerging over the Gulf of Alaska during 15-16 August 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 (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2025\/08\/250815_250816_surface_analyses_AK_anim.gif\"><strong>surface analyses<\/strong><\/a>) 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-2025-08-15T21:27:49+00:00\"><strong>USGS Volcano Notice<\/strong><\/a>, the National Weather Service issued a SIGMET advising that the maximum height of this resuspended ash was 6000 ft.<\/p>\n<p>Other similar resuspended ash events have been documented <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?s=resuspended+ash\"><strong>here<\/strong><\/a> on this blog.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>10-minute Full Disk scan GOES-18 (GOES-West) daytime True Color RGB and nighttime Dust RGB images created using Geo2Grid (above) showed a plume of resuspended volcanic ash (hazy shades of tan in True Color RGB, and subtle shades of violet in Dust RGB images) from the 1912 Novarupta-Katmai eruption in Alaska &#8212; which was being transported [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":66580,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[132,114,45,9],"tags":[],"class_list":["post-66575","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geo2grid","category-goes-18","category-redgreenblue-rgb-images","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66575","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=66575"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66575\/revisions"}],"predecessor-version":[{"id":66581,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/66575\/revisions\/66581"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/66580"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=66575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=66575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=66575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}