Any enquiries regarding interruptions to scheduled flights as the result of a volcanic event must be directed to the relevant airline/s
VAAC Darwin is one of nine Volcanic Ash Advisory Centres worldwide operating under the International Airways Volcano Watch and has responsibility for an area that includes the volcanically active regions of Indonesia, Papua New Guinea and the southern Philippines.
VAAC Darwin provides advice to the aviation industry about the location and movement of potentially hazardous volcanic ash.
Volcanic Ash Advisory Centres
The International Civil Aviation Organization has a downloadable Handbook on the International Airways Volcano Watch with details on how the warning system works.