1. Department of Earth Sciences University of Geneva Geneva Switzerland
2. Now at Institute of Earth Sciences University of Lausanne Lausanne Switzerland
3. Chair of Applied Geophysics University of Leoben Leoben Austria
4. Center for Hydrogeology and Geothermics University of Neuchâtel Neuchâtel Switzerland
5. Applied and Environmental Geophysics Group Institute of Earth Sciences, University of Lausanne Lausanne Switzerland