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Report on Nyamuragira (DR Congo) — 6 January-12 January 2010

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 6 January-12 January 2010
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2010. Report on Nyamuragira (DR Congo). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 6 January-12 January 2010. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (6 January-12 January 2010)


Nyamuragira

DR Congo

1.408°S, 29.2°E; summit elev. 3058 m

All times are local (unless otherwise noted)


The Washington VAAC reported a large sulfur dioxide plume in the vicinity of Nyamuragira and Nyiragongo during 10-11 January. According to a news article, lava from Nyamuragira continued to flow S and SW on 6 January, and had traveled 21 km to within 7 km of the road between Goma and Sake. On 7 January ashfall was reported in Goma, 30 km S.

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.

Sources: Agence France-Presse (AFP), Toulouse Volcanic Ash Advisory Centre (VAAC), Washington Volcanic Ash Advisory Center (VAAC), OpEdNews