1. Carnegie Institution for Science, Geophysical Laboratory, Washington, DC 20015, USA.
2. German Research Centre for Geosciences, GFZ, Telegrafenberg, 14473 Potsdam, Germany.
3. Department of Earth Sciences, Free University of Berlin, 12249 Berlin, Germany.
4. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.
5. RISE Research Institutes of Sweden, Bioscience and Materials/Chemistry, Materials and Surfaces, Box 5607, 114 86 Stockholm, Sweden.
6. NASA, Johnson Space Center, Houston, TX 77058, USA.
7. Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd, Washington, DC 20015, USA.
8. Earth and Environmental Sciences, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA.
9. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
10. USRA–Science and Technology Institute, 320 Sparkman Drive, Huntsville, AL 35805, USA.
11. Advanced Light Source, 1 Cyclotron Road, MS 7R0222, LBNL, Berkeley, CA 94720, USA.
12. ICRAG, Department of Geology, Trinity College Dublin, Dublin 2, Ireland.