https://phys.org/news/2018-06-bali-airport-agung-volcano-gushes.html > The regional Volcanic Ash Advisory Center in Darwin, Australia, said winds would carry the ash southwest toward Java, Indonesia's most densely populated island. Volcanic ash is a potentially deadly threat to aircraft that can cause engines to "flame out." > The volcano began belching ash and smoke on Thursday and several airlines canceled inbound and outbound flights scheduled for the evening.