@SeeingClearly Come on ! Windy.com does NOT make any forecast of SO2, or of any other parameters. They are sourced from weather models and satellite observations. In the case of sulfur dioxide the data are provided by the NASA. https://earth.nullschool.net/ shows similar SO2 map as they use the same data from NASA GEOS-5 May be the these data from GEOS-5 are overestimated?