Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Atmospheric composition Data Meteosat Metop Tags MSG IASI Europe GOME-2 SEVIRI Metop-A GOES Date 2008 SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study 14 August 2008 00:00 UTC SO2 plumes from the Kasatochi eruption Sulphur dioxide (SO2) plumes from the Kasatochi eruption circled the whole northern hemisphere over more than 20 days.