1. K. D. Nelson, M. Cogan, C. Wu, Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, USA.
2. W. Zhao, J. Che, X. Liu, Chinese Academy of Geological Sciences, Beijing 100037, China.
3. J. Kuo, Lamont Doherty Geological Observatory, Palisades, NY, 10964, USA.
4. S. L. Klemperer and Y. Makovsky, Department of Geophysics, Stanford University, Stanford, CA 94305, USA.
5. R. Meissner, Institut für Geophysik, Christian-Albrechts-Universitaet zu Kiel, 24098 Kiel, Germany.
6. J. Mechie and R. Kind, GeoForschungsZentrum Potsdam (GFZ), 14473 Potsdam, Germany.
7. F. Wenzel, Geophysikalisches Institut, Universitaet Karlsruhe, 76187 Karlsruhe, Germany.
8. J. Ni and E. Sandvol, Department of Physics, New Mexico State University, Las Cruces, NM 88003, USA.
9. J. Nabelek, College of Oceanography, Oregon State University, Corvallis, OR 97331, USA.
10. L. Chen, H. Tan, W. Wei, China University of Geosciences, Beijing, China.
11. A. G. Jones, Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario, Canada.
12. J. Booker and M. Unsworth, Geophysics Program, University of Washington, Seattle, WA 98195, USA.
13. W. S. F. Kidd and M. Edwards, Department of Geosciences, SUNY-Albany, Albany, NY 12222, USA
14. L. D. Brown, M. Hauck, D. Alsdorf, A. Ross, Institute for the Study of the Continents, Cornell University, Ithaca, NY 14853, USA.