PVMBG reported that the eruption at Lewotolok continued during 13-19 December. White-and-gray ash plumes rose 100 m on 13 December and drifted E. White steam-and-gas plumes rose 100-200 m above the summit on the other days and drifted E, NE, and NW. Incandescence lava was ejected 200 m from the vent on 15 and 18 December and summit incandescence was visible in webcam images on 16 and 19 December. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay at least 2 km away from the summit crater.

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)