The Darwin VAAC reported that on 20 May an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l., or 500 m above the crater rim, based on information from PVMBG.
Weather clouds prevented satellite views of the event.
The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Karymsky (Russia)
