1. R. Kind and Xiaohui Yuan, GeoForschungsZentrum Potsdam, 14473 Potsdam, Germany.
2. James Ni, Jianxin Wu, C. Reese, T. Hearn, Department of Physics, New Mexico State University, Las Cruces, NM 88003, USA.
3. Wenjin Zhao, Chinese Academy of Geological Sciences, Beijing, China
4. Lianshe Zhao, Institute for Geophysics, University of Texas at Austin, Austin, TX 78759, USA.
5. E. Sandvol, Department of Geological Sciences, Cornell University, Ithaca, NY 14853, USA.
6. J. Nabelek, College of Oceanography, Oregon State University, Corvalis, OR 97331, USA.