NIED S-net (Seafloor observation network for earthquakes and tsunamis along the Japan Trench) is an ocean bottom observation network consisting of 150 observation units from off Hokkaido to off Chiba Prefecture. Each unit contains seismometers and water pressure gauges to observe offshore earthquakes and tsunamis. All the data is transmitted to the land stations by fiber-optic cable and arrives at NIED in real time.
Station Locations (Japanese website)
http://www.seafloor.bosai.go.jp/st_info/
データ公表機関
防災科学技術研究所
データ公表機関(英)
National Research Institute for Earth Science and Disaster Resilience