PVMBG reported that the Strombolian eruption at Lewotolok continued during 6-13 April.
Gray-and-white ash plumes rose as high as 750 m above the summit and drifted in multiple directions.
Incandescent material was ejected 300-500 m above the summit on most days and 500 m SE on 8 April.
Incandescent material was ejected to the E during 9 and 11-12 April.
Rumbling was occasionally audible.
The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 4 km away from the summit crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)