Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 17 March an ash plume from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l.
and drifted W.
The next day an ash plume rose to an altitude of 3 km (10,000 ft) a.s.l.
and drifted almost 85 km W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)