1. School of Earth Science and Engineering; Hohai University; Nanjing China
2. Department of Computational Geophysics; Xi'an Jiaotong University; Xi'an China
3. State Key Laboratory of Petroleum Resources and Prospecting; China University of Petroleum (Beijing); Beijing China
4. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Sgonico Italy