1. Institute for Geophysics Jackson School of Geosciences University of Texas at Austin Austin TX USA
2. Department of Geological Sciences Jackson School of Geosciences University of Texas at Austin Austin TX USA
3. Department of Earth and Environmental Sciences University of Minnesota Minneapolis MN USA
4. Department of Geosciences Utah State University Logan UT USA
5. Dipartimento di Scienze della Terra La Sapienza Università di Roma Rome Italy
6. Department of Geosciences Pennsylvania State University State College PA USA