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Report on Nyamulagira (DR Congo) — February 1984


Nyamulagira

Scientific Event Alert Network Bulletin, vol. 9, no. 2 (February 1984)
Managing Editor: Lindsay McClelland.

Nyamulagira (DR Congo) Lava flows from NW flank

Please cite this report as:

Global Volcanism Program, 1984. Report on Nyamulagira (DR Congo) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 9:2. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198402-223020



Nyamulagira

DR Congo

1.408°S, 29.2°E; summit elev. 3058 m

All times are local (unless otherwise noted)


A NW flank eruption began 23 February at 1013 and was continuing in early March. By the end of February, two lava flows had extended 10 km. More than 25 eruptions have been documented from Nyamuragira since 1882.

Geological Summary. Africa's most active volcano, Nyamulagira (also known as Nyamuragira), is a massive high-potassium basaltic shield about 25 km N of Lake Kivu and 15 km NE of the steep-sided Nyiragongo volcano. The summit is truncated by a small 2 x 2.3 km caldera that has walls up to about 100 m high. Documented eruptions have occurred within the summit caldera, as well as from the numerous flank fissures and cinder cones. A lava lake in the summit crater, active since at least 1921, drained in 1938, at the time of a major flank eruption. Recent lava flows extend down the flanks more than 30 km from the summit as far as Lake Kivu; extensive lava flows from this volcano have covered 1,500 km2 of the western branch of the East African Rift.

Information Contacts: IRS; M. Krafft, Cernay.