1. Department of Geosciences University of Fribourg Fribourg Switzerland
2. Nagra Wettingen Switzerland
3. Institute of Geological Sciences and Oeschger Centre for Climate Change Research University of Bern Bern Switzerland
4. Federal Office of Topography Swisstopo Wabern Switzerland
5. Geological Institute ETH Zurich Zürich Switzerland
6. Department of Earth Sciences University of Geneva Geneva Switzerland