Proposal of gravitational exploration for effective use of gravity gradiometer data and its basic research

In this study, a new technique for estimating subsurface structure by gravity vectors (gx, gy, gz) was developed and applied to actual data in central Kyushu. The shape of each sedimentary basin was estimated clearly by this technique. In addition, estimation technique of fault dip using gravity gradient tensor was studied. Wall dip of caldera walls, the dip of tectonic lines distributed in the central Kyushu and the source fault dip of the 2016 Kumamoto earthquake were estimated by the method. Results obtained by this technique were harmony with real subsurface structures observed by other techniques and surveys.