Report on Nyamuragira (DR Congo) — February 1984
Scientific Event Alert Network Bulletin, vol. 9, no. 2 (February 1984)
Managing Editor: Lindsay McClelland.
Nyamuragira (DR Congo) Lava flows from NW flank
Please cite this report as:
Global Volcanism Program, 1984. Report on Nyamuragira (DR Congo) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 9:2. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198402-223020.
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.
Geologic Background. Africa's most active volcano, Nyamuragira, is a massive high-potassium basaltic shield about 25 km N of Lake Kivu. Also known as Nyamulagira, it has generated extensive lava flows that cover 1500 km2 of the western branch of the East African Rift. The broad low-angle shield volcano contrasts dramatically with the adjacent steep-sided Nyiragongo to the SW. The summit is truncated by a small 2 x 2.3 km caldera that has walls up to about 100 m high. Historical eruptions have occurred within the summit caldera, as well as from the numerous fissures and cinder cones on the flanks. A lava lake in the summit crater, active since at least 1921, drained in 1938, at the time of a major flank eruption. Historical lava flows extend down the flanks more than 30 km from the summit, reaching as far as Lake Kivu.
Information Contacts: IRS; M. Krafft, Cernay.