Report on Nyamulagira (DR Congo) — August 1992
Bulletin of the Global Volcanism Network, vol. 17, no. 8 (August 1992)
Managing Editor: Lindsay McClelland.
Nyamulagira (DR Congo) Intermittent lava extrusion and ash emission from several vents
Please cite this report as:
Global Volcanism Program, 1992. Report on Nyamulagira (DR Congo) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 17:8. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199208-223020
1.408°S, 29.2°E; summit elev. 3058 m
All times are local (unless otherwise noted)
Lava extrusion and ash emissions have continued intermittently during August at vents 19, 20, and 21 that opened in July. Microtremor amplitude has generally been decreasing since early August after remaining high through July.
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: N. Zana, CRSN, Bukavu.