1. Earthquake Research Institute University of Tokyo Tokyo Japan
2. School of Earth Sciences University of Western Australia WA Perth Australia
3. Lawrence Berkeley National Laboratory CA Berkeley USA
4. Department of Geological Sciences Chungnam National University Daejeon Korea
5. University of Texas at Dallas TX Dallas USA
6. School of Physics University of Western Australia WA Perth Australia
7. Japan Oil, Gas and Metals National Corporation Chiba Japan
8. Itochu Oil Exploration, Co., Ltd Tokyo Japan