Sinabung volcano (Northwestern Sumatra) - Smithsonian / USGS Weekly Volcanic Activity Report for 11 May-17 May 2022 (Continuing Activity)

PVMBG lowered the Alert Level for Sinabung to 2 (on a scale of 1-4) on 11 May, noting that data showed stability at the volcano. During 1 January-17 May gas emissions were frequently visible and detected by instruments; daily averages of sulfur dioxide emissions from passive degassing were below 250 tons per day, though a high value of about 4,000 tons per day was recorded in January, and white plumes of varying densities rose as high as 500 m above the summit. During the previous four months deformation data showed a downward trend and indicated deflation, and the number of deep and shallow volcanic earthquakes signals generally declined.
Growth of the SE part of the lava dome continued at a low rate as indicated by low numbers of earthquake signals caused by fluid movement. Avalanches of material were indicated by seismic signals though not visually confirmed. The public was warned to stay at least 3 km away from the summit and 4.5 km on the SE flank.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
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From: Global Volcanism Program, 2022. Report on Sinabung. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 11 May-17 May 2022. Smithsonian Institution and US Geological Survey.