RVO reported that ash plumes from Rabaul caldera’s Tavurvur cone continued to be emitted during 4-10 August. Ashfall was reported in areas NW. Occasionally incandescence at the summit was observed and roaring noises were reported. Incandescent lava fragments were ejected along with some of the more forceful ash emissions. Based on observations of satellite imagery and information from RVO, the Darwin VAAC reported that during 11-12 August, low-level ash plumes rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted NW.
Sources: Ima Itikarai, Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC) – - “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”