Fig. 7From: An automated ash dispersion forecast system: case study Popocatépetl volcano, MexicoEruption 07:16 UTC, 1st March, 2018. Observed ash, red polygon according to the Washington-VAAC. Forecasted ash concentration, coloured area in mg/m3 (see legend). VAAC image taken from the VAAC-Washington webpageBack to article page