{"id":71618,"date":"2026-07-31T23:59:00","date_gmt":"2026-07-31T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=71618"},"modified":"2026-08-03T18:23:51","modified_gmt":"2026-08-03T18:23:51","slug":"eruption-of-sheveluch-on-russias-kamchatka-peninsula","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/71618","title":{"rendered":"Eruption of Sheveluch on Russia&#8217;s Kamchatka Peninsula"},"content":{"rendered":"\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/GOES-18_RadF_ash_2026212_070022_2026213_120022.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>10-minute GOES-18 Ash RGB images, from 0700 UTC on 31 July to 1200 UTC on 01 August<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">According to the Tokyo <strong><a href=\"https:\/\/www.ospo.noaa.gov\/products\/atmosphere\/vaac\/other-vaacs.html\">VAAC<\/a><\/strong>, Sheveluch (located on Russia&#8217;s Kamchatka Peninsula) erupted around 0508 UTC (<strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_rjtd_vaa.text\">text<\/a><\/strong> | <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_0520utc_himawari9_trueColorRGB.png\">image<\/a><\/strong>) on 31 July 2026. A signature of the resulting volcanic cloud became apparent in 10-minute Full Disk scan GOES-18 <em>(GOES-West)<\/em> <strong><a href=\"https:\/\/rammb2.cira.colostate.edu\/wp-content\/uploads\/2020\/01\/GOES_Ash_RGB-1.pdf\">Ash RGB<\/a><\/strong> images <strong><em>(above)<\/em><\/strong> and <strong><a href=\"https:\/\/rammb2.cira.colostate.edu\/wp-content\/uploads\/2020\/01\/Dust_RGB_Quick_Guide-1-1.pdf\">Dust RGB<\/a><\/strong> images <em><strong>(below)<\/strong><\/em>, created using <strong><a href=\"https:\/\/www.ssec.wisc.edu\/software\/geo2grid\/\">Geo2Grid<\/a><\/strong>. Brighter shades of yellow in both RGB image types were indicative of a mixture of ash and SO<sub>2<\/sub> within the volcanic cloud. The volcanic cloud signature eventually became lost within a band of meteorological clouds associated with a cold front south of the Aleutian Islands.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/GOES-18_RadF_dust_2026212_070022_2026213_120022.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>10-minute GOES-18 Dust RGB images, from 0700 UTC on 31 July to 1200 UTC on 01 August<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">GOES-18 <strong><a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_G16_CloudPhaseBTD.pdf\">Split Cloud Top Phase<\/a><\/strong> images <strong><em>(below)<\/em><\/strong> included plots of Pilot Reports (PIREPs) and Volcanic Ash Advisory\/Forecast polygons issued by the Anchorage VAAC. The 8.4 \u00b5m spectral band is <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/Band_10_spectral_response_SO2.jpg\">sensitive to SO<sub>2 <\/sub>absorption<\/a><\/strong> which led to positive values (brighter green to yellow to red) in the imagery.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_260801_g18_irdif_Sheviluch.mov\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>10-minute GOES-18 Split Cloud Top Phase brightness temperature difference, with plots of Pilot Reports and Volcanic Ash Advisory\/Forecast polygons, from 0800 UTC on 31 July to 1210 UTC on 01 August<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">As the volcanic cloud advanced farther eastward across the Bering Sea, advisory responsibility was transferred from the Tokyo VAAC to the Anchorage VAAC, beginning at 1500 UTC on 31 July <strong><em>(below)<\/em><\/strong>. The leading, faster-moving portion of the volcanic cloud had a maximum altitude of FL340 (34000 feet) &#8212; while the trailing, slower-moving portion had a maximum altitude of FL250 (25000 feet).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_1500utc_g18_irdiff_vaa.png\"><img decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_1500utc_g18_irdiff_vaa.png\" alt=\"\"\/><\/a><figcaption class=\"wp-element-caption\"><em>GOES-18 Split Cloud Top Phase image at 1500 UTC on 31 July, with the initial Volcanic Ash Advisory\/Forecast polygons issued by the Anchorage VAAC for this event [click to enlarge]<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Wile many aircraft were flying above the FL340 (34000 feet) maximum altitude of the leading portion of the volcanic cloud, there were some pilot reports of Volcanic Ash (VA) clouds either in the distance or below the altitude of the aircraft <strong><em>(below)<\/em><\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_1630utc_g18_irdiff_pirep_va.png\"><img decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_1630utc_g18_irdiff_pirep_va.png\" alt=\"\"\/><\/a><figcaption class=\"wp-element-caption\"><em>GOES-18 Split Cloud Top Phase image at 1630 UTC on 31 July, with a Pilot Report of possible Volcanic Ash  (VA) to the NW [click to enlarge]<\/em><\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_2310utc_g18_irdiff_pirep_va.png\"><img decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260731_2310utc_g18_irdiff_pirep_va.png\" alt=\"\"\/><\/a><figcaption class=\"wp-element-caption\"><em>GOES-18 Split Cloud Top Phase image at 2310 UTC on 31 July, with a Pilot Report of VA at 29000 ft and below [click to enlarge]<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">The final Anchorage VAAC advisory for this event was issued at 1209 UTC on 01 August <strong><em>(below)<\/em><\/strong>, as the volcanic cloud was approaching the Washington VAAC area of responsibility.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260801_1210utc_g18_irdiff_vaa.png\"><img decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260801_1210utc_g18_irdiff_vaa.png\" alt=\"\"\/><\/a><figcaption class=\"wp-element-caption\"><em>GOES-18 Split Cloud Top Phase image at 1210 UTC on 01 August, with the final Volcanic Ash Advisory issued by the Anchorage VAAC for this event [click to enlarge]<\/em><\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>According to the Tokyo VAAC, Sheveluch (located on Russia&#8217;s Kamchatka Peninsula) erupted around 0508 UTC (text | image) on 31 July 2026. A signature of the resulting volcanic cloud became apparent in 10-minute Full Disk scan GOES-18 (GOES-West) Ash RGB images (above) and Dust RGB images (below), created using Geo2Grid. Brighter shades of yellow in [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":71658,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,132,114,45,9],"tags":[],"class_list":["post-71618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","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\/71618","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=71618"}],"version-history":[{"count":24,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71618\/revisions"}],"predecessor-version":[{"id":71685,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71618\/revisions\/71685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/71658"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=71618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=71618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=71618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}