{"id":58563,"date":"2024-04-17T16:58:00","date_gmt":"2024-04-17T16:58:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=58563"},"modified":"2024-04-19T04:10:17","modified_gmt":"2024-04-19T04:10:17","slug":"explosive-eruption-of-mount-ruang-in-indonesia","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/58563","title":{"rendered":"Explosive eruption of Mount Ruang in Indonesia"},"content":{"rendered":"
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Himawari-9 Infrared Window (10.4 \u00b5m) images from 1110-1600 UTC on 17 April [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n

10-minute JMA<\/a><\/strong> Himawari-9 AHI<\/a><\/strong> Infrared Window (10.4 \u00b5m) images (above)<\/strong><\/em> showed an explosive eruption of Mount Ruang<\/strong><\/a> in Indonesia on 17 April 2024. Note that a thunderstorm was reported at Menado (station identifier WAMM<\/strong><\/a>) from 1400-1430 UTC, due to abundant lightning activity<\/strong><\/a> within the dense volcanic umbrella cloud.<\/p>\n

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Himawari-9 Infrared Window (10.4 \u00b5m) image at 1240 UTC on 17 April [click to enlarge]<\/p><\/div>\n

In the Himawari-9 Infrared Window (10.4 \u00b5m) image at 1240 UTC (above)<\/strong>, the coldest pixel exhibited a brightness temperature of -88.8\u00baC (dark purple enhancement) — with an adjacent warm pixel of -46.4\u00baC (green enhancement), possibly a result of compensating subsidence immediately downwind of the robust updraft (which penetrated the local tropopause and extended into the lower stratosphere).<\/p>\n

Maximum radiometrically retrieved Ash Height<\/strong><\/a> values (source<\/strong><\/a>) reached 16-18 km. In a plot of rawinsonde data from Menado at 1200 UTC (below)<\/strong><\/em>, this height corresponded to the 80-110 hPa pressure level.<\/p>\n

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Plot of rawinsonde data from Menado at 1200 UTC on 17 April [click to enlarge]<\/p><\/div>\n

In Himawari-9 Ash RGB<\/strong><\/a>\u00a0images created using Geo2Grid<\/strong><\/a> (below)<\/strong><\/em>, shades of pink around the the umbrella cloud represented higher concentrations of volcanic ash, while shades of green to yellow represented increasing concentrations of volcanic SO2.<\/p>\n

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Himawari-9 Ash RGB images, from 1110-1600 UTC on 17 April [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n\n\n

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27 hour long SO2 RGB loop from Himawari-9 over the #Ruang<\/a> volcano eruption. Yellow and red are indicative of upper level SO2 which has been dispersed since the large plume was emitted beginning around 11:00 UTC yesterday (04\/17\/2024). Made with McIDAS-V. pic.twitter.com\/4bNtINlqMA<\/a><\/p>— Robert Carp (@rmcarp) April 18, 2024<\/a><\/blockquote>