Abstract:A new gravity map of the Fukuoka district was published. It is a map of the 1:200,000 gravity map series by the Geological Survey of Japan, AIST. The gravity data were compiled from 11,937 stations including 1,513 new stations. These new gravity surveys were carried out around the Fukuoka area. We show the table with gravity data for 706 new stations around the central part of the Fukuoka City area. This Bouguer gravity anomaly map with an assumed density of 2.3 g/cm 3 clearly revealed the structural boundaries between the central part of the Fukuoka City and its surroundings.
We canˆnd many symmetrical gravity anomalies such as center point symmetry in the gravity map series (1 : 200,000) published by Geological survey of Japan, AIST. To analyze these gravity anomalies, the authors reviewed the computing equations of vertical gradient of gravity caused by the model bodies with center point symmetry (vertical solid circular cylinder, circular cone, circular parabola, ellipsoid). Some characteristics are described in the maps drawn by these computing equations.
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