Logo link to homepage

Report on Raung (Indonesia) — 27 January-2 February 2021

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 27 January-2 February 2021
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2021. Report on Raung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 27 January-2 February 2021. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (27 January-2 February 2021)


Raung

Indonesia

8.119°S, 114.056°E; summit elev. 3260 m

All times are local (unless otherwise noted)


PVMBG reported that daily gray-to-brown ash plumes rose 400-700 m above Raung’s summit and drifted SE, E, and NE during 26 January-2 February. Incandescence from the crater was often seen reflected in the emissions and rumbling was sometimes heard. At 2354 on 2 February an ash plume rose 1 km and drifted E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Geologic Background. Raung, one of Java's most active volcanoes, is a massive stratovolcano in easternmost Java that was constructed SW of the rim of Ijen caldera. The unvegetated summit is truncated by a dramatic steep-walled, 2-km-wide caldera that has been the site of frequent historical eruptions. A prehistoric collapse of Gunung Gadung on the W flank produced a large debris avalanche that traveled 79 km, reaching nearly to the Indian Ocean. Raung contains several centers constructed along a NE-SW line, with Gunung Suket and Gunung Gadung stratovolcanoes being located to the NE and W, respectively.

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