Satellite detection of an SO2 cloud from Bogoslof volcano, Alaska, detected by the IASI infrared satellite sensor on 22 December 2016 at 08:03 UTC (21 December 2016 11:03pm AKST). Color bar indicates the density of SO2 (DU) measured within a column of atmosphere. Image courtesy of the Support to Aviation Control Service (SACS) SO2 Alert system Belgian Institute for Space Aeronomy.
Image courtesy of the AVO/UAF-GI.