**6. References**


**8** 

*France* 

**Automatic Mapping of the Lava Flows at** 

**Thermal Data in Near and Visible Infrared** 

Z. Servadio1,2, N. Villeneuve1 and P. Bachèlery3,4 *1Laboratoire Géosciences Réunion, Université de la Réunion, Institut de Physique du Globe de Paris, CNRS, UMR 7154,* 

*Géologie des Systèmes Volcaniques, Saint Denis 2Institut de Recherche pour le Développement, US 140,* 

*3Clermont Université, Université Blaise Pascal, Laboratoire Magmas et Volcans, CNRS, UMR 6524, Observatoire de Physique du Globe de Clermont-Ferrand,* 

*4IRD, R 163, LMV, F-63038 Clermont-Ferrand* 

*BP172, 97492 Sainte-Clotilde Cedex* 

*BP 10448, F-63000 Clermont-Ferrand* 

**Piton de la Fournaise Volcano, by Combining** 

Knowing the eruptive history of a volcano is an essential key to the understanding of its functioning, and therefore of the evolution of the character of dangerousness of its eruptions. For an essentially effusive basaltic volcano such as the Piton de la Fournaise, the spatial and temporal distribution of lava flows allows to deduct numerous parameters of its activity, on a magmatic and a structural point of view. Satellite imaging brings more advantages than the methods used in aerial pictures studies, especially by supplying bigger temporal and spectral series. The revisiting of satellites over a region can allow the generation of dynamic mappings of the implementation of the lava flow, and also bring information on the phenomenology of the eruptions: Surface, volume, flow, spatial

Furthermore, satellite images have the advantage of supplying data that grant a global visualization of the study area, and information on not easily accessible areas. The interpretation of these satellite data enables obtaining information on the surfaces and volumes of the lava field flows, but also on its nature and behavior. In a tropical environment such as La Reunion, where the climatological context presents a strong

The optical satellite images have already been successfully used to realize mappings of lava flows. For example, in Nevado Subancaya in Peru (Legelay-Padovanie et al., 1997) or in Etna in Italy (Honda et al.,2002), the combination of spectral and morphological properties helped to elaborate surface lava flows mappings and also allowed to individualize the main

cloudiness, a satellite revisit is statistically necessary.

**1. Introduction** 

distribution…

Zhang, D. (1993). Preliminary Study on Visual Interpretation Marks of Building Damages Caused by Earthquakes on Aero Photograph, *Earthquake*, Vol.13, No.1, pp. 26-30, ISSN 1000-3274.
