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Piton de la Fournaise

volcano
Piton de la Fournaise erupting in 2010 (Photo: Sylvie and Philippe CHOUKROUN)
Piton de la Fournaise erupting in 2010 (Photo: Sylvie and Philippe CHOUKROUN)
Piton de la Fournaise, un volcan bouclier basaltiques typiques, situé sur l'île française La Réunion, est un des volcans les plus actifs et les plus productifs du monde. C'est dans une phase d'éruptions fréquentes mais de courte durées qui commencent avec les fontaines de lave et de produire des coulées de lave grand. Puisque les zones actives du volcan ne sont pas habitées, ses éruptions posent peu de danger et causent peu de dommages.
Type de volcan volcan bouclier Activité petite ou avertissement éruption imminente
Place
Elévation du sommet 2631 m (8,632 ft)
Eruptions du volcan Piton de la Fournaise 1900, 1901, 1901, 1902, 1903(?), 1904, 1905, 1907, 1908(?), 1909, 1910, 1913, 1915, 1917, 1920, 1921, 1924, 1924, 1925-26, 1926-27, 1929, 1930, 1931, 1932, 1933-34, 1935(?), 1936, 1937, 1938, 1938-39, 1941, 1942, 1943, 1944, 1945, 1946, 1947(?), 1948, 1948(?), 1950, 1951(?), 1951, 1952, 1953, 1954, 1955-57, 1958, 1959, 1960, 1961, 1963, 1964, 1964-65, 1966, 1972, 1973, 1973, 1975-76, 1976, 1977, 1977, 1979, 1981, 1983-84, 1985-88, 1990, 1991, 1992, 1998, 1999, 2000 (Feb-March), 2001 (March-April), 2001 (June-July), 2002 (Jan.), 2002 (Nov-Dec), 2003 (May) - 2004 (Jan), 2004 (May), 2004 (Aug-Oct), 2005 (Feb-March), 2005 (Oct), 2005 (Nov), 2005 (Dec)-2006 (Jan)
Style éruptif tipique effusif
Piton de la Fournaise is a typical example of a hot-spot volcano. The volcano is about 530,000 years old and during much of this time, its activity overlapped with eruptions of its older neighbor, the deeply dissected Piton des Neiges shield volcano to the NW.



Three calderas formed at about 250,000, 65,000, and less than 5000 years ago by progressive eastward slumping of the volcano. Numerous pyroclastic cones dot the floor of the calderas and their outer flanks. Most historical eruptions have originated from the summit and flanks of Dolomieu, a 400-m-high lava shield that has grown within the youngest caldera called the Enclos, which is 8 km wide and breached to below sea level on the eastern side. More than 150 eruptions, most of which have produced fluid basaltic lava flows, have occurred since the 17th century. Only six eruptions, in 1708, 1774, 1776, 1800, 1977, and 1986, have originated from fissures on the outer flanks of the caldera. The Piton de la Fournaise Volcano Observatory, one of several operated by the Institut de Physique du Globe de Paris, monitors this very active volcano.



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Source: adapted from GVP/Smithsonian Institution

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