PVMBG reported that during 1 September-3 October the Strombolian eruption at Anak Krakatau continued, though foggy conditions often prevented visual observations.
Ash plumes mainly rose 200-500 m above the crater rim and drifted NW to SW.
On 22 September ash plumes rose as high as 2.5 km; ejected incandescent material mostly landed on the flanks (less than 1 km from the crater), and a small amount fell into the sea.
Lava flows on the SSE flank also reached the sea.
The Alert Level remained at 2 (on a scale of 1-4); residents and visitors were warned not to approach the volcano within 2 km of the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)