PVMBG reported that daily gray and sometimes black ash plumes rose 200-1,200 m above Raung?s summit during 17-23 February.
Ash plumes were sometimes dense and drifted mainly N, NE, E, and S.
The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)