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Detailed multidisciplinary monitoring reveals pre- and co-eruptive signals at Nyamulagira volcano (North Kivu, Democratic Republic of Congo)

B. Smets ; N. d'Oreye ; F. Kervyn ; M. Kervyn ; F. Albino ; Santiago Arellano (Institutionen för rymd- och geovetenskap, Optisk fjärranalys) ; M. Bagalwa ; C. Balagizi ; S. A. Carn ; T. H. Darrah ; J. Fernandez ; Bo Galle (Institutionen för rymd- och geovetenskap, Optisk fjärranalys) ; P. J. Gonzalez ; E. Head ; K. Karume ; D. Kavotha ; F. Lukaya ; N. Mashagiro ; G. Mavonga ; Patrik Norman (Institutionen för rymd- och geovetenskap, Optisk fjärranalys) ; E. Osodundu ; J. L. G. Pallero ; J. F. Prieto ; S. Samsonov ; M. Syauswa ; D. Tedesco ; K. Tiampo ; C. Wauthier ; M. M. Yalire
Bulletin of Volcanology (0258-8900). Vol. 76 (2014), 1,
[Artikel, refereegranskad vetenskaplig]

This paper presents a thorough description of Nyamulagira's January 2010 volcanic eruption (North Kivu, Democratic Republic of Congo), based on a combination of field observation and ground-based and space-borne data. It is the first eruption in the Virunga Volcanic Province that has been described by a combination of several modern monitoring techniques. The 2010 eruption lasted 26 days and emitted similar to 45.5x10(6) m(3) of lava. Field observations divided the event into four eruptive stages delimited by major changes in effusive activity. These stages are consistent with those described by Pouclet (1976) for historical eruptions of Nyamulagira. Coeruptive signals from ground deformation, seismicity, SO2 emission and thermal flux correlate with the eruptive stages. Unambiguous pre-eruptive ground deformation was observed 3 weeks before the lava outburst, coinciding with a small but clear increase in the short period seismicity and SO2 emission. The 3 weeks of precursors contrasts with the only precursory signal previously recognized in the Virunga Volcanic Province, the short-term increase of tremor and long period seismicity, which, for example, were only detected less than 2 h prior to the 2010 eruption. The present paper is the most detailed picture of a typical flank eruption of this volcano. It provides valuable tools for re-examining former-mostly qualitative-descriptions of historical Nyamulagira eruptions that occurred during the colonial period.

Nyckelord: Virunga, Nyamulagira, Nyamuragira, East African Rift, Volcanic eruption, Volcano monitoring, Remote, WESTERN RIFT-VALLEY, NYAMURAGIRA VOLCANO, RADAR INTERFEROMETRY, GROUND, DEFORMATION, TIME-SERIES, EARTHS SURFACE, DECEMBER 1981, VIRUNGA, ZAIRE, AFRICA, MANT A, 1994, BULLETIN OF VOLCANOLOGY, V56, P47, OINFORMATION, V23, P142, NAEYER ME, 1957, COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES, MULDER M, 1986, CHEMICAL GEOLOGY, V57, P117



Denna post skapades 2014-08-21. Senast ändrad 2014-09-02.
CPL Pubid: 201775

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Optisk fjärranalys

Ämnesområden

Geovetenskap och miljövetenskap

Chalmers infrastruktur