PVMBG reported that the eruption at Semeru continued during 20-26 May, though sometimes foggy conditions prevented visual confirmation.
Incandescent material from the ends of lava flows descended 400-700 m in the Kembar drainage (on the S flank) during 20-21 and 25-26 May, reaching a maximum distance of 1.2 km from the crater.
Ash plumes rose 200-500 m above the crater and drifted S during 19-20 May and N during 24-25 May.
White plumes rose 400 m and drifted NE, E, S, and W on 26 May.
The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)