On Friday, an Indonesian volcano–Sangeang Api–sent plumes of ash as high as 65,000 feet. The ash quickly began drifting southeastward toward the Northern Territories of Australia. Darwin Airport was shut down and airlines Virgin Australia and JetStar canceled a number of flights that could have brought aircraft within the vicinity of those clouds. Authorities expect the ash to dissipate this week as it moves further east, although the volcano is still erupting.