PVMBG reported that the eruption at Lewotolok continued during 20-27 September. Daily white emissions rose as high as 350 m above the summit and drifted in multiple directions. At 0350 on 23 September an eruptive event produced an ash plume that rose 800 m and drifted W. An image captured at that time showed Strombolian activity with incandescent material being ejected above the summit. White-and-gray plumes generally rose as high 500 m and drifted NW, W, and S that same day. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 3 km away from the summit crater and 4 km away from the crater on the SE flank.

Geological Summary. The Lewotolok (or Lewotolo) stratovolcano occupies the eastern end of an elongated peninsula extending north into the Flores Sea, connected to Lembata (formerly Lomblen) Island by a narrow isthmus. It is symmetrical when viewed from the north and east. A small cone with a 130-m-wide crater constructed at the SE side of a larger crater forms the volcano's high point. Many lava flows have reached the coastline. Eruptions recorded since 1660 have consisted of explosive activity from the summit crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)