1. Department of Geological Sciences Jackson School of Geosciences The University of Texas at Austin Austin TX USA
2. Jackson School of Geosciences Institute for Geophysics The University of Texas at Austin Austin TX USA
3. Department of Science University of Roma Tre Rome Italy
4. GFZ Helmholtz Centre Potsdam German Research Centre for Geosciences Potsdam Germany
5. Department of Earth Science Geological Institute ETH Zürich Zürich Switzerland
6. School of Earth and Environment Institute of Geophysics and Tectonics University of Leeds Leeds UK
7. Now at German Aerospace Center (DLR) Berlin Germany
8. Department of Earth Science Institute of Geophysics ETH Zürich Zürich Switzerland
9. Department of Earth Sciences Utrecht University Utrecht The Netherlands