PVMBG reported that an eruption at Sinabung was recorded at 2039 on 11 May.
An ash plume was not visible due to weather conditions, although crater incandescence was noted.
An eruption at 1233 on 12 May was recorded by the seismic network; foggy weather prevented visual confirmation.
The Alert Level remained at 4 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions to 7 km on the SSE sector, 6 km in the ESE sector, and 4 km in the NNE sector.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)