RVO reported quiet conditions at Kadovar during 1-20 September with only diffuse white plumes rising from the volcano.
Activity increased on 21 September and remained elevated at least through 26 September, the date the last visual observation was received by RVO.
During the period if increased activity dense dark gray and brown ash plumes rose several hundred meters above the summit crater (700-800 m) and drifted NW.
Intense incandescence from Main Crater, the SE coastal vent, and other areas was visible.
Minor amounts of ash fell on Blup Blup island.
On 1 October an ash plume rose to 900 m (9,000 ft) a.s.l.
and drifted W.
An ash plume was visible in satellite images on 3 October drifting W at an altitude of 2.1 km (3,000 ft) a.s.l.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Rabaul Volcano Observatory (RVO)