Korbinian Sager^1,2, Christian Boehm¹, Laura Ermert³, Lion Krischer¹ and Andreas Fichtner¹, (1)ETH Zurich, Department of Earth Sciences, Institute of Geophysics, Zurich, Switzerland, (2)Brown University, Earth, Environmental and Planetary Sciences, Providence, RI, United States, (3)University of Oxford, Oxford, United Kingdom