1. Department of Earth, Atmospheric and Planetary SciencesMassachusetts Institute of Technology Cambridge Massachusetts USA
2. Lamont‐Doherty Earth ObservatoryColumbia University Palisades New York USA
3. Department of Earth, Atmospheric, and Planetary SciencesPurdue University West Lafayette Indiana USA
4. Now at Department of Applied GeologyCurtin University Perth Western Australia Australia
5. Planetary Science DirectorateSouthwest Research Institute Boulder Colorado USA
6. Department of Geophysics and Center for Space ResourcesColorado School of Mines Golden Colorado USA
7. Department of Earth and Planetary SciencesUniversity of California Santa Cruz California USA
8. Department of Earth, Environmental and Planetary SciencesBrown University Providence Rhode Island USA
9. NASA Goddard Space Flight Center Greenbelt Maryland USA
10. Department of Terrestrial MagnetismCarnegie Institution of Washington Washington District of Columbia USA
11. Lunar and Planetary LaboratoryUniversity of Arizona Tucson Arizona USA
12. Institut de Physique du Globe de Paris, Sorbonne Paris CitéUniversité Paris Diderot Paris France