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
pan Collaborative Program, and funding was provided by NSF grant(s): OCE02-41375, OCE02-41380, OCE02-41482, OCE97-30637, OCE98-02264, and OCE98-02295.

本数据集采用1999年Maurice Ewing探险EW9907期间搭载的船舶式Atlas Hydrosweep DS多波束声纳系统和BellAerospace BGM-3重力仪所采集。数据文件采用MGD77格式，包含重力场和单波束测深数据，并在数据采集后进行了处理。数据采集作为以下项目的一部分：对欧亚-菲律宾海板块边界地震至非地震过渡带的3D地震调查：美日合作项目，俯冲沉积物中的地震速度、压实度和孔隙水压力，以及沉积岩过渡带与南海俯冲断层的地震活动关系的3D地震调查：美日合作项目，项目资助由美国国家科学基金会（NSF）提供的资助编号OCE02-41375、OCE02-41380、OCE02-41482、OCE97-30637、OCE98-02264和OCE98-02295承担。