Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Satellites Atmospheric Composition Weather Meteosat Metop Sentinel Tags GOME-2 IASI Metop-A Europe Meteosat Second Generation (MSG) SEVIRI Sentinel-3 Metop-B EPS Asia GOES Date 2020 2014 2008 SHOW ALL Sort by Start Date Order Ascending Descending 3 results Case study Jan, Feb, March 2007-2020 EUMETSAT Science Blog Pollution levels drop during COVID-19 lockdown The COVID-19 lockdown in early 2020 had a visible effect on pollution. Case study 1 April 02:56 UTC–2 April 2014 02:58 EUMETSAT Science Blog High air pollution in parts of Western Europe On 1 April GOME-2 instruments on Metop-A and -B observed elevated levels of NO2 total column concentration over parts of Europe. Case study 14 August 2008 00:00 UTC EUMETSAT Science Blog SO2 plumes from the Kasatochi eruption Sulphur dioxide (SO2) plumes from the Kasatochi eruption circled the whole northern hemisphere over more than 20 days.