1. Department of Earth and Planetary Sciences; Massachusetts Institute of Technology; Cambridge Massachusetts USA
2. Department of Earth Science; Rice University; Houston Texas USA
3. Laboratory of Seismology and Physics of Earth's Interior; School of Earth and Space Sciences; University of Science and Technology of China; Hefei Anhui China
4. State Key Laboratory of Petroleum Resource and Prospecting, and Unconventional Natural Gas Institute; China University of Petroleum; Beijing China