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| | Abstract | | GSJ has started seismic, gravity and electromagnetic surveys in Yunodake fault and Idosawa faults area in Iwaki city, Fukushima prefecture. The gravity survey was carried out at about 2,000 points. The position of all the gravity stations was surveyed with GNSS (Global Navigation Satellite System). The result of the gravity survey indicates that steep gravity anomaly changes correspond to the Yunodake and Yamada fault. East and west Idosawa faults are located at high gravity anomaly ridges. |
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