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| | Abstract | | An ultra-high resolution 3D (UHR3D) seismic survey was carried out in Hinagu Fault Zone, Yatsushiro Sea, Kyushu, Japan, using "Autonomous Cable System (ACS)" developed by JGI, Inc. with a boomer source. This survey was conducted to delineate the detailed active fault distribution and its activities in this area. The original field data were heavily contaminated with various environmental noises, amplified by very shallow cable acquisition, then a comprehensive noise suppression was applied to eliminate such noises. The footprint noises caused by various type of water column statics, such as tidal changes and cable depth variations, were also suppressed to improve reflection images. Thanks to the elaborate processing, a high resolution 3D data volume was successfully obtained. This result demonstrates the feasibility of UHR3D in precise delineation of the subsurface active fault system in this region. |
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