JMA Himawari-9 True Color RGB images created using Geo2Grid (above) showed the ash-laden (darker shades of gray) volcanic cloud produced by an eruption of Mount Marapi that began at 0754 UTC on 03 December 2023. The final advisory issued by the Darwin VAAC estimated that ash extended to 50000 ft (15.2 km).A radiometrically retrieved Volcanic Ash... Read More

GOES-16 (GOES-East) SO2 RGB and Ash RGB images (above) showed a remnant volcanic cloud from the 31 October Klyuchevskaya eruption as it moved over southern Saskatchewan, northern North Dakota and far northwestern Minnesota on 06 November 2023. The volcanic cloud exhibited brighter shades of orange-yellow in the SO2 RGB imagery, and darker shades of blue in the... Read More

JMA Himawari-9 Ash RGB images created using Geo2Grid (above) showed the complex transport of Kyluchevskaya volcanic plumes — which were a mixture of ash (shades of pink to red-orange) and SO2 (brighter shades of yellow) — during the 3-day period from 31 October to 02 November 2023. Much of the transport... Read More

GOES-18 (GOES-West) SO2 RGB and Ash RGB images (above) showed the complex transport of a volcanic cloud produced by an explosive eruption of Mount Shishaldin that began around 1350 UTC on 03 October 2023. The bulk of the higher-altitude volcanic cloud was rich in SO2 (shades of yellow in both RGB types), while a smaller mid-level portion that had... Read More