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Report on Marapi (Indonesia) — 8 February-14 February 2023


Marapi

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 8 February-14 February 2023
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2023. Report on Marapi (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 8 February-14 February 2023. Smithsonian Institution and US Geological Survey.

Weekly Report (8 February-14 February 2023)

Marapi

Indonesia

0.38°S, 100.474°E; summit elev. 2885 m

All times are local (unless otherwise noted)


PVMBG reported that the eruption at Marapi continued during 8-14 February. White, gray, and black plumes rose as high as 400 m and drifted SW and S on 10 February. At 1827 a dense black ash plume rose 400 m and drifted NE and E. White-and-gray plumes that were sometimes dense rose as high as 200 m and drifted E and SE on 12 February. Diffuse white-and-gray plumes rose 100 m and drifted N and S on 13 February. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the crater.

Geological Summary. Gunung Marapi, not to be confused with the better-known Merapi volcano on Java, is Sumatra's most active volcano. This massive complex stratovolcano rises 2,000 m above the Bukittinggi Plain in the Padang Highlands. A broad summit contains multiple partially overlapping summit craters constructed within the small 1.4-km-wide Bancah caldera. The summit craters are located along an ENE-WSW line, with volcanism migrating to the west. More than 50 eruptions, typically consisting of small-to-moderate explosive activity, have been recorded since the end of the 18th century; no lava flows outside the summit craters have been reported in historical time.

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