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From Wikipedia, the free encyclopedia

Nyamuragira
Nyiragongo and Nyamuragira - PIA03337.png
Nyamuragira (left) and Nyiragongo (right). Vertical scale exaggerated (1.5×).
Highest point
Elevation3,058 m (10,033 ft) [1]
Coordinates1°24′29″S 29°12′00″E / 1.408°S 29.2°E / -1.408; 29.2[1]
Geography
Nyamuragira is located in Democratic Republic of the Congo
Nyamuragira
Nyamuragira
Democratic Republic
LocationNord-Kivu, Democratic Republic of the Congo
Parent rangeVirunga Mountains
Geology
Mountain typeShield volcano
Last eruption2014

Nyamuragira, also known as Nyamulagira, is an active shield volcano in the Virunga Mountains of the Democratic Republic of the Congo, situated about 25 km north of Lake Kivu. The name is derived from the Kifuru and kishi verb Kuragira ngavu, meaning to herd cows; ngavu means cow or cows.[citation needed]

It has been described as Africa's most active volcano[2] and has erupted over 40 times since 1885.[3] As well as eruptions from the summit, there have been numerous eruptions from the flanks of the volcano, creating new smaller volcanoes that have lasted only for a short time (e.g. Murara from late 1976 to 1977).

Recent eruptions occurred on 2 January 2010 and 8 November 2011.

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  • ✪ DR Congo's Nyamuragira volcano
  • ✪ Nyamuragira Eruption at Virunga National Park - Day 2
  • ✪ Nyamulagira lava lake

Transcription

Contents

Geography and geology

Nyamuragira volcano is an active volcano near the city of Goma of the Democratic Republic of the Congo, situated about 25 km north of Lake Kivu. It is in the Nord-Kivu Province. It is 13 km north-north-west of Nyiragongo, the volcano which caused extensive damage to the city of Goma in its 2002 eruption. Nyamuragira has a volume of 500 cubic km, and covers an area of 1,500 km2. It has a low shield profile, and contrasts with adjacent steep-sided Nyiragongo volcano.

Sulfur dioxide emissions by volcanoes, 1979-2003.
Sulfur dioxide emissions by volcanoes, 1979-2003.

Nyamuragira volcano is responsible for a large portion of the sulfur dioxide released into the atmosphere by volcanoes.

Lava flows from Nyamuragira (upper left) extend to Lake Kivu.
Lava flows from Nyamuragira (upper left) extend to Lake Kivu.

Recent activity

2010 eruption

At dawn on 2 January 2010, Nyamuragira began spewing out lava flows. There are no settlements close to the volcano, but wildlife officials feared that the eruption may threaten the chimpanzees in the area. Another danger was that the lava could have flowed into the southern sector of Virunga National Park, where there are settlements and villages.[4]

Extensive lava flows from the 2010 eruption can be seen on satellite photographs[5] reaching 25 km south-west to Lake Kivu, about 22 km north-west and 35 km north-north-east.

2011 eruption

The volcano erupted again on 5 November 2011.[6]

That eruption produced a 400-meter high column of lava, and it is said to have been its largest eruption in 100 years.[7]

2014 lava lake

Part of crater of Nyamuragira volcano
Part of crater of Nyamuragira volcano

In 2014, a new lava lake appeared at the volcano for the first time in 75 years. The previous lava lake at the volcano was emptied in the 1938 lava flow. The formation of the new lake occurred between June and August 2014.[8] It reached a depth of 500 metres. The eruption did not affect the communities in the area but left a lot of ash and air pollution. Sulfate aerosols formed by volcanic sulfur dioxide from the eruptions were observed as far away as over the central Amazon rain forest in South America.[9] By 2018, the lava lake had hardened and the activity appeared to have stopped.[10]

See also

References

  1. ^ a b "Nyamuragira". Global Volcanism Program. Smithsonian Institution. Retrieved 22 August 2006.
  2. ^ Smets, B.; Wauthier, C.; d’Oreye, N. (2010), "A new map of the lava flow field of Nyamulagira (D.R. Congo) from satellite imagery", Journal of African Earth Sciences, 58 (5): 778–786, doi:10.1016/j.jafrearsci.2010.07.005
  3. ^ "Volcano erupts in Congo". CNN. 2 January 2010. Retrieved 13 February 2011.
  4. ^ "DR Congo Volcano Eruption Threatens Rare Chimpanzees". BBC News. 2 January 2010. Retrieved 2 January 2010.
  5. ^ Google Earth Archived 8 September 2010 at the Wayback Machine shows the crater and lava flows very clearly at coordinates -1.408333, 29.200000
  6. ^ "Congo Volcano Erupts: Video". The Guardian. 8 November 2011. Retrieved 8 November 2011.
  7. ^ "Nyamuragira Volcano, Democratic Republic of the Congo". Volcano Photos. Geographic.org. Retrieved 26 December 2011.
  8. ^ "New Lava Lake Appears Atop African Volcano". iflscience. Retrieved 15 November 2017.
  9. ^ Saturno, Jorge; et al. (2018), "African volcanic emissions influencing atmospheric aerosols over the Amazon rain forest" (PDF), Atmospheric Chemistry and Physics, 18 (5): 10391–10405, doi:10.5194/acp-18-10391-2018
  10. ^ "Volcano on the Brink". PBS. Retrieved 27 November 2018.

External links

This page was last edited on 1 November 2019, at 12:55
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