Christian Weidle¹, Lars Wiesenberg¹, Amr Mohammed Mahmoud Elsayed El-Sharkawy^1,2, Thomas Michael Meier¹ and Sergei Lebedev³, (1)University of Kiel, Institute of Geosciences, Kiel, Germany, (2)National Research Institute of Astronomy and Geophysics, Helwan, Egypt, (3)Dublin Institute for Advanced Studies, Dublin, Ireland