{"id":53639,"date":"2023-07-23T19:00:00","date_gmt":"2023-07-23T19:00:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=53639"},"modified":"2023-07-25T01:20:01","modified_gmt":"2023-07-25T01:20:01","slug":"eruption-of-mount-shishaldin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/53639","title":{"rendered":"Eruption of Mount Shishaldin"},"content":{"rendered":"

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GOES-18 SO2 RGB and Ash RGB images, 0700-1900 UTC [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>GOES-18\u00a0(GOES-West)<\/em>\u00a0SO2 RGB<\/strong><\/a>\u00a0and\u00a0Ash RGB<\/strong><\/a>\u00a0images\u00a0(above)<\/strong><\/em> showed the northeastward drift of a volcanic cloud produced by an eruption of Mount Shishaldin<\/strong><\/a> that began shortly before 0730 UTC on 23 July 2023. The initial (higher-altitude) portion of the volcanic cloud likely contained moderate concentrations of SO2 (denoted by brighter shades of yellow in the SO2 RGB images) \u2014 while the trailing (lower-altitude) portion of the volcanic cloud likely contained concentrations of ash (shades of pink in the Ash RGB images). The ash signature dissipated after about 4 hours, while the SO2 signature persisted for the duration of the 11.5-hour animation.<\/p>\n

A toggle between the SO2 RGB and Ash RGB images at 1000 UTC is shown below.<\/p>\n

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GOES-18 Ash RGB and SO2 RGB images at 1000 UTC [click to enlarge]<\/p><\/div>A pilot report issued at 0727 UTC (below)<\/strong><\/em> indicated that volcanic ash (VA) was rising to altitudes of 30000 feet (FL300).<\/p>\n

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GOES-18 Ash RGB image at 0720 UTC, with cursor sampling of a Pilot Report issued at 0727 UTC [click to enlarge]<\/p><\/div>\n

===== 24 July Update =====<\/strong><\/p>\n

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GOES-18 SO2 RGB images, 0700 UTC on 23 July to 1700 UTC on 24 July [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>A longer animation of GOES-18 SO2 RGB images (above)<\/strong><\/em> showed the distinct SO2 signature (brighter shades of yellow) from the Shishaldin eruption, as it rotated counterclockwise within the circulation of a slow-moving middle tropospheric low in the Bering Sea — moving over far southwest Alaska and St. Lawrence Island on 23 July, and eventually becoming stretched into a long\/narrow filament over far eastern Russia on 24 July.<\/p>\n","protected":false},"excerpt":{"rendered":"

GOES-18\u00a0(GOES-West)\u00a0SO2 RGB\u00a0and\u00a0Ash RGB\u00a0images\u00a0(above) showed the northeastward drift of a volcanic cloud produced by an eruption of Mount Shishaldin that began shortly before 0730 UTC on 23 July 2023. The initial (higher-altitude) portion of the volcanic cloud likely contained moderate concentrations of SO2 (denoted by brighter shades of yellow in the SO2 RGB images) \u2014 while […]<\/p>\n","protected":false},"author":18,"featured_media":53643,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,114,45,9],"tags":[],"class_list":["post-53639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","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\/53639","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=53639"}],"version-history":[{"count":14,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53639\/revisions"}],"predecessor-version":[{"id":53682,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53639\/revisions\/53682"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/53643"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=53639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=53639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=53639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}