A new map of the lava flow field of Nyamulagira (D.R. Congo) from satellite imagery |
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| Institution: | 1. Dipartimento di Scienze della Terra, Università di Torino Italy;2. Dipartimento di Scienze della Terra, Università di Firenze Italy;3. NatRisk, Centro Interdipartimentale sui Rischi Naturali in Ambiente Montano e Collinare, Universita'' degli Studi di Torino, Italy;1. Department of Earth and Environmental Sciences, Macquarie University, Sydney, NSW, Australia;2. School of Environment, The University of Auckland, Auckland, New Zealand;1. Department of Earth Sciences, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium;2. Department of Geography, Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;3. Department of Geology, Université Officielle de Bukavu, Site Universitaire de Karhale, Kadutu, 570 Bukavu, Congo;4. Centre des Recherches Géologiques et Minières, Station Provincial de Lwiro, B.P. 7, Bukavu, Congo;5. Department of Geography, University of Liège, Clos Mercator 3, 4000 Liège, Belgium;6. Fonds de la Recherche Scientifique - FNRS, Rue d''Egmont, 5, 1000 Brussels, Belgium |
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| Abstract: | Nyamulagira (3058 m a.s.l.), a volcano of the Virunga volcanic province in the western branch of the East African Rift, is Africa’s most active volcano with one eruption every 2–4 years. It represents a hazard for the Virunga National Park and its vicinity. Despite such a frequent activity, Nyamulagira remains poorly studied. The only existing volcanological map was produced in the sixties by Thonnard et al. (1965). The occurrence of 19 eruptions since its publication makes it obsolete. In the present study we mapped the Nyamulagira lava flows from 1938 up to the last eruption to date in 2010 using optical (Landsat, ASTER) and radar (ENVISAT-ASAR, ERS, JERS) imagery. The results are integrated into a Geographical Information System (GIS) and coupled with additional data sources. GIS use makes the new database a flexible – and easy-to-update – tool for scientific purposes as well as for risk, environmental and humanitarian management. Here a new lava flow map was produced. Volumes of the successive lava flows and affected areas of the Virunga National Park were estimated. |
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