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Japan's Banks: Top 10 In Deposits, Nathaniel C. Nash
Cold-Seep Benthic Communities In The Japan Subduction Zones: Geological Control Of Community Development, Myriam Sibuet, S. Kim Juniper, Guy Pautot
Cold-Seep Benthic Communities In The Japan Subduction Zones: Geological Control Of Community Development, Myriam Sibuet, S. Kim Juniper, Guy Pautot
Journal of Marine Research
A large number of Calyptogena-dominated benthic communities, apparently chemosynthetically-based, were discovered at methane-rich pore-water seeps in the Japan subduction zones (3850–6000 m depth). Photographic and video surveys from four submersible dives were analyzed to study the influence of faulting, topography and substratum on exploitation of cold seeps by megafauna. Pore-water seepage occurred in a variety of geological settings, including subduction-erosion and accretionary prism formation, always in association with major faults which likely facilitated upward migration of fluids from a deep high-pressure zone. Sediment cover and manganese crusts on the seafloor appeared to block pore-water discharge, except where interrupted by …
Tide Gauge Response To Tsunamis: Measurements At 40 Tide Gauge Stations In Japan, Kenji Satake, Masami Okada, Kuniaki Abe
Tide Gauge Response To Tsunamis: Measurements At 40 Tide Gauge Stations In Japan, Kenji Satake, Masami Okada, Kuniaki Abe
Journal of Marine Research
The responses of tide gauges to tsunamis are examined by in situ measurements at 40 stations in northeastern Japan. Recovery of water level in the tide well is measured after the water is drained or added to create a water level difference between the inside and outside of the wells. The recovery times for a 1 m water level difference, estimated from the observations, vary from station to station and range from 65 to 1300 sec. Tsunami waveforms on tide gauge records from the 1983 Japan Sea earthquake are corrected for the observed response. For those stations with the observed …