Mt Niragongo- Renewed Activity Of The Lava Lake

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Journal Article: Mt Niragongo- Renewed Activity Of The Lava Lake

Abstract
On the 21st of June, 1982, Mt. Niragongo ended a period of dormancy that had begun on January 11, 1977, and fresh lava began to flow into the 800-m-deep crater. On October 3, a huge lava lake, wider and deeper than any previously observed (500 m across and close to 400 m deep) rose to within 440 m of the crater rim. The observed activity consisted of a large, central upwelling fountain of very fluid lava from which concentric lava waves expanded radially; numerous small, relatively viscous lava flows creeped over the surrounding thin solidified crust, that covered about 95% of the lake area. These observed features seem to characterize the upper part of a large convective system. The persistence of such an extraordinarily large steady-state lava lake may be due to the equally exceptional fluidity of the magma rising at the intersection of four different tectonic trends of fractures in the subvolcanic basement.

Author 
H. Tazieff








Published Journal 
Journal of Volcanology and Geothermal Research, 1984





DOI 
Not Provided
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Citation

H. Tazieff. 1984. Mt Niragongo- Renewed Activity Of The Lava Lake. Journal of Volcanology and Geothermal Research. (!) .