By Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, Laurent Michon
Piton de l. a. Fournaise and Karthala are either safeguard volcanoes within the southwest Indian Ocean. This ebook summarizes the paintings performed on those very lively basaltic volcanoes. Piton de los angeles Fournaise has an extended historical past of clinical learn and tracking, with many facts gathered in the course of fresh eruptions. it really is one in all the main studied volcanoes on the earth. The paintings offered during this monograph comprises geological, geophysical, geochemical and petrological points, but additionally stories on actual geography, normal dangers and the sociological and behavioural approaches.'
The Karthala volcano should be much less popular, however it serves as an engaging comparability to Piton de l. a. Fournaise. even if positioned with reference to the volcanoes of Hawaii, it differs from them via its extra alkaline magmas and no more common task. It was once additionally monitored for greater than 25 years, generating striking eruptions in fresh years.
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Extra info for Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala
Ten or so eruptions were reported between Lacroix’s visit and the great July–August 1931 eruption (Jean 1935). This latter eruption is the second most voluminous historical eruption, after the 2007 eruption (Bachèlery et al. 2010), with an estimated volume of 135 × 106 m3, which is one order of magnitude greater than the average for the “usual” eruptions. Following this huge emission of lava, a major volcano-tectonic event would have happened at the summit, with a large collapse of the summit (Fig.
2009), when the summit collapse occurred simultaneously with a huge flank eruption, the collapse following the 1931 large flank eruption seems to have occurred progressively over the following years. The observations of the summit were very discontinuous at that time, therefore it is difﬁcult to establish the dynamics of the collapse. However, reliable reports of Jean (in Lacroix 1936) suggest that the collapse may have even started as early as 1927 and lasted until 1935, with major phases in 1933–35.
11 Drawing of the Central Cone, as seen from the north, by von Drasche (1878) in 1875: a Bory crater; b Brûlant crater; c Puy mi-Côte; d A recent lava flow corresponding with the disappearance of the Mamelon Central. Ten or so eruptions were reported between Lacroix’s visit and the great July–August 1931 eruption (Jean 1935). This latter eruption is the second most voluminous historical eruption, after the 2007 eruption (Bachèlery et al. 2010), with an estimated volume of 135 × 106 m3, which is one order of magnitude greater than the average for the “usual” eruptions.
Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala by Patrick Bachelery, Jean-François Lenat, Andrea Di Muro, Laurent Michon