The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported increased eruptive activity at Lewotolok. Increased seismicity was detected during 1-4 January. Generally white plumes rose 25-50 m above the summit, though at 1209 on 4 January a white-and-gray ash plume rose about 300 m above the summit and material was ejected 300 m and onto the SE flank. White-and-gray ash plumes rose 200-500 m above the summit and drifted E and NE at 1543 on 5 January, at 0831 on 6 January, and at 0831, at 1152, and at 1802 on 7 January. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 2 km away from the summit and 2.5 km away on the SSE and W flanks.

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)