HR: 16:30h
AN: V24B-03    [Abstracts]
TI: Size and volume evaluation of the caldera collapse on Piton de la Fournaise volcano during the April 2007 eruption by ASTER stereo imaging function
AU: * Urai, M
EM: urai-minoru@aist.go.jp
AF: Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1, Tsukuba, 305-8567, Japan
AU: Geshi, N
EM: geshi-nob@aist.go.jp
AF: Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1, Tsukuba, 305-8567, Japan
AU: Staudacher, T
EM: staud@univ-reunion.fr
AF: Observatoire volcanologique du Piton de la Fournaise/Institut de Physique du Globe de Paris, 14 RN3, le 27ème km, La Plaine des Cafres, 97418, France
AB: The scale of a summit collapse on Piton de la Fournaise volcano, Réunion Island, western Indian Ocean, during the April 2007 eruption was evaluated using the DEM difference before and after the collapse obtained by the ASTER satellite sensor. The horizontal across, volume and depth of the depression were estimated as 1100 × 800 m, 9.6 × 107 m3 and 320 m, respectively. These estimations show excellent agree with field survey data. A ring shaped thermal anomaly that has a diameter of about 500 m was found at Dolomieu Crater during or just after the collapse on nighttime ASTER SWIR image. It may correspond to the high temperature areas associated with the cross section of hydrothermal zone at a constant altitude inside the crater.
DE: 8419 Volcano monitoring (7280)
DE: 8428 Explosive volcanism
DE: 8440 Calderas
DE: 8485 Remote sensing of volcanoes
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting