Report on Nyamuragira (DR Congo) — January 1980
Scientific Event Alert Network Bulletin, vol. 5, no. 1 (January 1980)
Managing Editor: David Squires.
Nyamuragira (DR Congo) Lava flowing northward
Please cite this report as:
Global Volcanism Program, 1980. Report on Nyamuragira (DR Congo). In: Squires, D. (ed.), Scientific Event Alert Network Bulletin, 5:1. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198001-223020.
1.408°S, 29.2°E; summit elev. 3058 m
All times are local (unless otherwise noted)
The Agence Zairoise de Presse (AZAP) news agency reports that an eruption from the N side of Nyamuragira began at 2100 on 30 January. As of 1 February lava was moving northward toward the agricultural community of Mweso at what was described as a "quite rapid" rate. A "considerable" distance and area had been covered by the lava.
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: AZAP.