Measurements of the GOME-2 (Global Ozone Monitoring Experiment) instrument on board MetOp reveal large amounts of sulphur dioxide (SO2) ejected by the volcano (Figure 1). As part of a volcano activity monitoring service DLR-DFD provides forecasts of the time-spatial distribution of the volcanic ash and SO2-cloud. Figure 2 shows a 60 hours forecast based on forward trajectory ensembles started between 0 and 20km above sea level. Three days after the first eruption ash particles and trace gases that have been lifted up above 15km will reach the middle of the state Alberta, Canada.
Mount Redoubt volcano is still unstable and further eruptions are expected.