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Report on Lewotobi (Indonesia) — 22 May-28 May 2024


Lewotobi

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 22 May-28 May 2024
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2024. Report on Lewotobi (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 22 May-28 May 2024. Smithsonian Institution and US Geological Survey.

Weekly Report (22 May-28 May 2024)

Lewotobi

Indonesia

8.542°S, 122.775°E; summit elev. 1703 m

All times are local (unless otherwise noted)


PVMBG reported that eruptive activity at Lewotobi’s Laki-laki volcano continued during 22-28 May. Gray-and-white ash plumes rose 100-800 m above the summit and drifted N, SW, and W during 22-25 May. White steam-and-gas plumes rose as high as 100 m above the summit and drifted W and SW during 26-27 May. The seismic network recorded daily eruptive events during 23-28 May, though there was no visual confirmation. The Alert Level remained at 2 (the second lowest level on a scale of 1-4) and the public was warned to stay outside of the exclusion zone, defined as a 2-km radius around Laki-laki crater, 3 km to the NNE, and 5 km on the NE flanks.

Geological Summary. The Lewotobi edifice in eastern Flores Island is composed of the two adjacent Lewotobi Laki-laki and Lewotobi Perempuan stratovolcanoes (the "husband and wife"). Their summits are less than 2 km apart along a NW-SE line. The conical Laki-laki to the NW has been frequently active during the 19th and 20th centuries, while the taller and broader Perempuan has had observed eruptions in 1921 and 1935. Small lava domes have grown during the 20th century in both of the summit craters, which are open to the north. A prominent cone, Iliwokar, occurs on the E flank of Perampuan.

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