[ASME ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering - Estoril, Portugal (Sunday 15 June 2008)] Volume 6: Nick Newman Symposium on Marine Hydrodynamics; Yoshida and Maeda Special Symposium on Ocean Space Utilization; Special Symposium on Offshore Renewable Energy - Dense Ocean Floor Network for Earthquakes and Tsunamis Around the Nankai Trough Mega Thrust Earthquake Seismogenic Zone in Southwestern Japan: Real Time Monitoring of the Seismogenic Zone