for advice regarding ash
dispersal. These are the Volcanic Ash Advisory Centers (VAAC) and they are
currently nine worldwide: Anchorage, Buenos Aires, Darwin, London, Montreal,
Tokyo, Toulouse, Washington and Wellington. Each of these centers have the
responsibility to advice about ash dispersal from volcanoes in fixed defined
areas around the world. These centers monitor and produce
/volcanoes/grimsvotn-activity/faq/