Ship-based Trackline Geophysical Data (MGD77) from the Nankai Trough Subduction Zone acquired during the Maurice Ewing expedition EW9907 (1999)

This data set was acquired with a ship-based Atlas Hydrosweep DS Multibeam Sonar system and BellAerospace BGM-3 Gravimeter during Maurice Ewing expedition EW9907 conducted in 1999 (Chief Scientist: Dr. Nathan Bangs). These data files are of MGD77 format and include Gravity Field and Singlebeam Bathymetry data and were processed after data collection. Data were acquired as part of the project(s): A 3-D Seismic Investigation of the Aseismic to Seismic Transition along the Eurasian-Phillippine Sea Plate Boundary: U.S.-Japan Cooperative Program, Seismic Velocity, Compaction, and Pore Pressure in Underthrust Sediments, Nankai Subduction Zone, and A 3-D Seismic Investigation of the Sediment-to-Rock Transition and Its Relationship to Nankai Subduction Thrust Seismicity: U.S.-Ja\r pan Collaborative Program, and funding was provided by NSF grant(s): OCE02-41375, OCE02-41380, OCE02-41482, OCE97-30637, OCE98-02264, and OCE98-02295.