Kelud volcano on Indonesia’s Java island erupted late on the night of 14th February. While disaster-management authorities are busy on the ground, satellites are tracking the major cloud of ash and sulphur dioxide as it spreads in the atmosphere. “The ash has reached high altitudes where commercial aircraft
fly and is a significant hazard to aviation,” said Fred Prata from the Norwegian
Institute for Air Research. Airports across Java have closed, and multiple flights have been cancelled throughout the region.