Ash concentration CSV files
Modelled volcanic ash concentration forecasts are available below. Volcanic ash forecasts are only available from London VAAC for volcanoes erupting within the London VAAC area.
The CSV files below supplement the London Volcanic Ash Advisory Graphics (VAG) and Advisories (VAA). They are to be used with caution. The 200 microgram contour represents the outer edge of the low concentration zone and will approximate to that used in the VAG and VAA, however due to the automated