The Darwin VAAC reported that on 10 July an ash plume from Semeru rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted WNW based on satellite images and weather models. Ash plumes rose to 4 km (13,000 ft) a.s.l. on 13 July and drifted NW and W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)