近畿トライアングル周縁域の地震活動の相関とその地学的意義

抄録

It is shown that seismic activities in the Mino area, the Tamba area and the Wakayama area, which constitute three circumferential areas of the Kinki Triangle, are correlated each other. The seismic activity in the Tamba area and that in the Wakayama area have a tendency to increase and decrease concurrently, while the seismic activity in the Mino area seems to precede about 3 years the seismic activities in the other two areas. Existence of such correlations indicates that the stress fields in the three circumferential areas of the Kinki Triangle are closely interrelated each other. Further, the precedence of change of the seismic activity in the Mino area suggests that the origin of the prevailing stress field in these regions is attributed to the east side of the Kinki Triangle.