Potential Flank-Collapse of Soufrière Volcano, Guadeloupe, Lesser Antilles? Numerical Simulation and Hazards |
| |
| Authors: | Anne Le Friant Georges Boudon Jean-Christophe Komorowski Philippe Heinrich Michel P Semet |
| |
| Institution: | (1) Institut de Physique du Globe de Paris et CNRS, Equipe Volcanologie, 4, Place Jussieu, case 89, 75252 Paris Cedex 05, France;(2) Laboratoire de Détection et de Géophysique, C.E.A., 91680 Bruyères-le-Chatel, France |
| |
| Abstract: | The past history of recurrent flank collapses of la Soufrière volcano of Guadeloupe, its structure, its well-developed hydrothermal
system and the current activity constitute factors that could promote a future flank collapse, particularly in the case of
a significant increase of activity, with or without shallow magmatic input. To address the hazards associated with such a
collapse, we model the emplacement of the debris avalanche generated by a flank-collapse event in 1,250 BC (3,100 years B.P.).
We use a finite-difference grain-flow model solving mass and momentum conservation equations that are depth-averaged over
the slide thickness, and a Coulomb-type friction law with a variable basal (minimum) friction angle. Using the parameter values
determined from this simulation, we then simulate the debris avalanche which could be generated by a potential collapse of
the present lava dome. We then discuss the region which could be affected by such a future collapse, and additional associated
hazards of concern. |
| |
| Keywords: | flank-collapse debris avalanche Soufrière Volcano Guadeloupe Lesser Antilles numerical simulation hazards |
| 本文献已被 SpringerLink 等数据库收录！ |
|
