The image, taken by the German radar satellite TerraSAR-X, shows the volcano 'Piton de la Fournaise' (Furnace Peak) in the south of the island of La Réunion (Indian Ocean). This is the last active volcano on the island and is 2631 metres high. By means of very precise repeat-pass interferometric measurements, TerraSAR-X is able to detect even small movements of the Earth's surface, thus supporting volcano monitoring.
The image was obtained on 5 June 2008. It was acquired in spotlight mode with a resolution of two metres and covers an area of 11×10 kilometres.