Report on Lewotolok (Indonesia) — 11 August-17 August 2021
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
11 August-17 August 2021
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2021. Report on Lewotolok (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 11 August-17 August 2021. Smithsonian Institution and US Geological Survey.
8.274°S, 123.508°E; summit elev. 1431 m
All times are local (unless otherwise noted)
PVMBG reported that the Strombolian eruption at Lewotolok continued during 11-17 August. White, gray, and sometimes black plumes rose as high as 2 km above the summit and drifted S, NW, and W during 10-12 August. Incandescent lava was ejected 200-350 m radially on 10 August, accompanied by banging noises. Ash plumes rose 100-300 m during 13-17 August and drifted NE and W. Incandescence from the SW part of the crater was visible during 15-16 August. 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.
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.