Updates on volcanic activity (Smithsonian)
The Smithsonian/USGS Weekly Volcanic Activity Report provides information about global volcanism on a weekly basis. Latest Sinabung report has been published on 28 Jul 2021 08:35.
PVMBG reported that white-and-gray plumes rose 100-300 m above Sinabung during 20-21 July and drifted N, NE, E, and SE. During 21-27 July white plumes rose as high as 400 m and drifted NE, E, and SE. At 1320 on 28 July an eruption produced an ash plume that rose 4.5 km above the summit and drifted E and S; the event lasted for about 12 and a half minutes. The Aviation Color Code was raised to Red. 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)
See the detail here