Report on Lewotolok (Indonesia) — 7 July-13 July 2021
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
7 July-13 July 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, 7 July-13 July 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 daily white-and-gray plumes from Lewotolok rose as high as 1.1 km and drifted SW, W, and NW during 6-12 July. Incandescent material was ejected from the summit vent on 6, 8, and 10 July; on 6 July material landed as far as 300 m away. The Darwin VAAC noted that on 7 July an ash plume rose 2.7 km (9,000 ft) a.s.l. and drifted E, based on satellite data and information from PVMBG. 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.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)