1. Helmholtz Centre Potsdam, German Research Center for Geosciences (GFZ); Telegrafenberg; Potsdam Germany
2. Institute of Earth and Environmental Science; University of Potsdam; Potsdam Germany
3. Ecole Normale Suprieure de Paris; Laboratoire de Gologie; Paris CEDEX 5 France
4. Faculty of Geo-Information Science and Earth Observation (ITC); University of Twente, AE; Enschede Netherlands
5. Now at Istanbul University; Department of Geography; Istanbul Turkey
6. National Institute for Land and Infrastructure Management; Research Center for Disaster Risk Management, 1 Asahi; Tsukuba Japan