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Nyamuragira, a large shield volcano similar to Mauna Loa on Hawai'i, is one of Africa's most active volcanoes. Every few years, it produces eruptions often from radial fissures emitting lava fountains and large, fluid lava flows travelling many kilometers into the scarsely populated area of tropical forest and farmland surrounding it.
Nyamuragira volcano (DR Congo): new lava lake forming in summit crater ?
Friday Apr 27, 2012 22:23 PM | BY: T
Nyamuragira volcano in the DR Congo might be forming a new lava lake in its summit caldera.
The volcano's last eruption from the Kimanura fissure NE of the summit caldera seems to have ended by now. Until early to mid March, a lava lake was observed in the eastern vent and a strong heat source could be detected on satellite imagery, but has now disappeared.
Seismic explosion signals from a source under the summit were noted on 24 February from the summit crater and overflights showed increased degassing from the central pit, which contained a lava lake until 1940. This activity increased in April and a strong SO2 odor from this area suggests the presence of near-surface magma. Scientists and the park rangers are speculating about the possibility that a new lava lake in the summit crater might be about to form.
During our recent expedition, we visited Nyamuragira's ongoing eruption during 22-25 January, and found that the eruption is still going on strongly, but somewhat less intense than during the first 1-2 weeks in January. ... [more]
During expedition to Nyiragongo in Jan 2012, we undertook a side trip to see Nyamuragira still in eruption. Lorraine sent us the following impressions of impressive lava fountains from the new vent (taken 8 Jan). [more]
The eruption at Nyamuragira volcano (DR Congo) continues with lava fountains 50-150 m high, ejections of incandescent bombs reaching up to 600 m, and the emission of an aa lava flow from the second (eastern) vent. ...
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