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1.关于首都圈南部地震活动的研究(1)研究目标沿海沟发生的巨大地震和直下型地震使日本政治经济中心的首都圈屡遭重大灾害。为了推进与之相应的地震预报研究,有必要避开首都圈特有的人为噪声和厚松软地基的影响,高精度连续观测作为前兆现象的地震活动及地形变。为此,要通过对围绕首都圈的3个地方(岩概、下总、府中)到达基底的深层地壳活动观测设施所得的微震及地倾斜观测资料的解析,进行首都圈南部的地震预报研究。
1. Research on Seismic Activities in the South of the Tokyo Metropolitan Area (1) Study Target The massive earthquakes in the trenches and direct-seismogenic earthquakes have repeatedly caused major disasters in the metropolitan area of Japan’s political and economic center. In order to promote the corresponding earthquake prediction research, it is necessary to avoid the influence of man-made noises and thick soft ground peculiar to Seoul metropolitan area, and to observe the earthquake activity and the topography as a precursor phenomenon continuously with high precision. Therefore, earthquake prediction studies in the southern metropolitan area should be conducted by analyzing microseismic and ground-tilt observations obtained from deep crustal activity observation facilities that have reached the basement in three places around the metropolitan area (Iwatsu, Ichinoseki, Fuchu).