{"id":27095,"date":"2018-02-19T16:05:01","date_gmt":"2018-02-19T16:05:01","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=27095"},"modified":"2018-02-21T03:44:39","modified_gmt":"2018-02-21T03:44:39","slug":"eruption-of-mount-sinabung-volcano","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/27095","title":{"rendered":"Eruption of Mount Sinabung volcano"},"content":{"rendered":"

\"Himawari-8<\/a>

Himawari-8 RGB images [click to play animation]<\/p><\/div>An explosive eruption of Mount Sinabung<\/strong><\/a> began at 0153 UTC on 19 February 2018. Himawari-8 False-color Red-Green-Blue (RGB) images from the NOAA\/CIMSS Volcanic Cloud Monitoring<\/strong><\/a> site (above)<\/strong><\/em> showed the primary plume of high-altitude ash moving northwestward, with ash at lower altitudes spreading out to the south and southeast of the volcano.<\/p>\n

Mutli-spectral retrievals of Ash Cloud Height (below)<\/strong><\/em> indicated that the explosive eruption injected volcanic ash to altitudes generally within the 12-18 km range, possibly reaching heights of 18-20 km. Advisories<\/strong><\/a> issued by the Darwin VAAC<\/strong><\/a> listed the ash height at 45,000 feet (13.7 km).<\/p>\n

\"Himawari-8<\/a>

Himawari-8 Ash Height product [click to play animation]<\/p><\/div>Ash Loading values (below)<\/strong><\/em> were also very high within the high-altitude portion of the plume.<\/p>\n

\"Himawari-8<\/a>

Himawari-8 Ash Loading product [click to play animation]<\/p><\/div>The Ash Effective Radius product (below)<\/strong><\/em> indicated that very large particles were present in the portion of the plume immediately downwind of the eruption site.<\/p>\n

\"Himawari-8<\/a>

Himawari-8 Ash Effective Radius product [click to play animation]<\/p><\/div>In a comparison of Himawari-8 “Red” Visible (0.64 \u00b5m), Shortwave Infrared (3.9 \u00b5m) and “Clean” Infrared Window (10.4 \u00b5m) images (below),<\/strong><\/em> note the very pronounced warm thermal anomaly or “hot spot” (large cluster of red pixels)<\/em> on the 0150 UTC<\/strong><\/a> image — Himawari-8 was actually scanning that location at 01:54:31 UTC, just after the 0153 UTC eruption. Prior to the main eruption (beginning at 0120 UTC), a very narrow volcanic cloud<\/strong><\/a> — likely composed primarily of condensed steam — was seen streaming rapidly southward from the volcano summit.<\/p>\n

\"Himawari-8<\/a>

Himawari-8 “Red” Visible (0.64 \u00b5m, left),<\/em> Shortwave Infrared (3.9 \u00b5m, center)<\/em> and “Clean” Infrared Window (10.4 \u00b5m, right)<\/em> images [click to play Animated GIF | MP4<\/strong><\/a> also available]<\/p><\/div>The coldest Himawari-8 cloud-top infrared brightness temperature was -73 \u00baC at 0300 UTC, which roughly corresponded to an altitude of 15 km on nearby WIMM<\/strong> <\/a>(Medan) rawinsonde data<\/strong><\/a> at 00 UTC (below<\/strong>)<\/strong><\/em>.<\/p>\n

\"Medan,<\/a>

Medan, Indonesia rawinsonde data at 00 UTC on 19 February [click to enlarge]<\/p><\/div>A Terra MODIS True-color RGB image viewed using RealEarth<\/strong><\/a> is shown below. The actual time of the Terra satellite overpass was 0410 UTC.<\/p>\n

\"Terra<\/a>

Terra MODIS True-color RGB image [click to enlarge]<\/p><\/div>An animation of Himawari-8 True-color RGB images can be seen here<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

An explosive eruption of Mount Sinabung began at 0153 UTC on 19 February 2018. Himawari-8 False-color Red-Green-Blue (RGB) images from the NOAA\/CIMSS Volcanic Cloud Monitoring site (above) showed the primary plume of high-altitude ash moving northwestward, with ash at lower altitudes spreading out to the south and southeast of the volcano. Mutli-spectral retrievals of Ash […]<\/p>\n","protected":false},"author":18,"featured_media":27098,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62,12,45,71,9],"tags":[],"class_list":["post-27095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-himawari-8","category-modis","category-redgreenblue-rgb-images","category-terra","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/27095","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=27095"}],"version-history":[{"count":25,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/27095\/revisions"}],"predecessor-version":[{"id":27124,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/27095\/revisions\/27124"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/27098"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=27095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=27095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=27095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}