Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Meteosat Atmospheric composition Data Metop Tags MSG SEVIRI IASI Europe GOME-2 Metop-A GOES Date 2008 Date August 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.