1. Department of Earth and Planetary Sciences Washington University in St. Louis St. Louis Missouri USA
2. Department of Geosciences Pennsylvania State University University Park Pennsylvania USA
3. Department of Geosciences Colorado State University Fort Collins Colorado USA
4. Department of Geological Sciences Central Washington University Ellensburg Washington USA
5. Byrd Polar Research Center and School of Earth Sciences Ohio State University Columbus Ohio USA
6. Institute for Geophysics, Jackson School of Geosciences University of Texas at Austin Austin Texas USA
7. Department of Geophysics Tohoku University Sendai Japan