{"id":15798,"date":"2014-05-30T23:59:24","date_gmt":"2014-05-30T23:59:24","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=15798"},"modified":"2014-06-02T13:22:56","modified_gmt":"2014-06-02T13:22:56","slug":"eruption-of-the-sangeang-api-volcano-in-indonesia","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/15798","title":{"rendered":"Eruption of the Sangeang Api volcano in Indonesia"},"content":{"rendered":"
\"MTSAT-2<\/a>

MTSAT-2 0.63 \u00b5m visible channel and 10.8 \u00b5m IR channel images at 08:32 UTC<\/p><\/div>\n

A comparison of McIDAS images of MTSAT-2 0.63 \u00b5m visible channel and 10.8 \u00b5m IR channel data at 08:32 UTC on 30 May 2014 (above)<\/strong><\/em> showed the volcanic cloud from the first in a series of eruptions of the Sangeang Api<\/strong><\/a> volcano in Indonesia (aircraft photos<\/strong><\/a>). The coldest cloud-top IR brightness temperature at that time was -74.5\u00ba C; note that the tall volcanic cloud was casting a large shadow toward the east-southeast in the visible image.<\/p>\n

An animation of MTSAT-2 10.8 \u00b5m IR images (below; click image to play animation; also available as an MP4 movie file<\/a>)<\/strong><\/em> revealed that there were a number of smaller eruptions that followed the initial, larger eruption.<\/p>\n

\"MTSAT-2<\/a>

MTSAT-2 10.8 \u00b5m IR channel images (click to play animation)<\/p><\/div>\n

\u00a0———————————————————————————————————<\/p>\n

\"MTSAT-2<\/a>

MTSAT-2 false-color RGB images (click to play animation)<\/p><\/div>\n

The NOAA\/CIMSS Volcanic Cloud Monitoring<\/strong><\/a> MTSAT-2 false-color Red\/Green\/Blue (RGB) images (above; click image to play animation)<\/strong><\/em> showed the southeastward spread of volcanic ash cloud from the first 2 eruptions, while the Volcanic Ash Height product (below; click image to play animation)<\/strong><\/em> indicated that the ash may have reached altitudes of at least 12-14 km. Pilot reports in the vicinity placed the height of the volcanic cloud at 65,000 feet or 19.8 km.<\/p>\n

\"NOAA\/CIMSS<\/a>

NOAA\/CIMSS Volcanic Ash Height product (click to play animation)<\/p><\/div>\n

Night-time McIDAS-V images of Suomi NPP VIIRS 11.45 \u00b5m IR, 3.9 \u00b5m shortwave IR, and 0.7 \u00b5m Day\/Night Band (DNB) images of one of the secondary eruptions at 17:43 UTC on 30 May (below; courtesy of William Straka, SSEC)<\/strong><\/em> showed a cloud-top IR brightness temperature as cold as -77\u00ba C, along with the yellow-enhanced “hot spot” on the shortwave IR and the bright glow on the DNB image from the hot volcano vent and lava flows.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00b5m IR, 3.9 \u00b5m shortwave IR, and 0.7 \u00b5m Day\/Night Band images<\/p><\/div>\n

A composite of Suomi NPP VIIRS true-color RGB images from 31 May, viewed using the SSEC RealEarth<\/strong><\/a> web map server (below)<\/strong><\/em> showed the widespread extent of the volcanic ash cloud from the ongoing eruption.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS true-color RGB image composite<\/p><\/div>\n

Due to the southeastward drift of the primary volcanic ash plume toward Australia, flights were cancelled at the Darwin airport. MTSAT-2 visible and IR images with polygons of Volcanic Ash Advisories are shown below (click image to play animation)<\/strong><\/em>.<\/p>\n

\"MTSAT-2<\/a>

MTSAT-2 visible and IR images, with Volcanic Ash Advisory polygons<\/p><\/div>\n

===== 01 June Update =====<\/strong><\/p>\n

A comparison of Suomi NPP VIIRS true-color images from 31 May and 01 June (below)<\/strong><\/em> showed that while the eruption was still ongoing, the amount of ash output had dramatically decreased.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS true-color images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A comparison of McIDAS images of MTSAT-2 0.63 \u00b5m visible channel and 10.8 \u00b5m IR channel data at 08:32 UTC on 30 May 2014 (above) showed the volcanic cloud from the first in a series of eruptions of the Sangeang Api volcano in Indonesia (aircraft photos). The coldest cloud-top IR brightness temperature at that time […]<\/p>\n","protected":false},"author":18,"featured_media":15799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,20,53,45,49,48,9],"tags":[],"class_list":["post-15798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","category-mtsat","category-real-earth","category-redgreenblue-rgb-images","category-suomi_npp","category-viirs","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15798","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=15798"}],"version-history":[{"count":24,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15798\/revisions"}],"predecessor-version":[{"id":15823,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15798\/revisions\/15823"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/15799"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=15798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=15798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=15798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}