名古屋地域の深部地盤構造 I : 第 1 回名古屋鍋田爆破実験

Abstract

Through the observations of seismic waves generated from the 1st Nagoya-Nabeta explosion, the deeper ground structure of Nagoya area was clarified. The results are summarized as follows. 1) The thickness of the uppermost soft layer with the velocity of Vp=1.4km/sec is about 90m at Nabeta shot point. 2) The thickness of the dominant surface layer with the velocity of Vp=2.2km/sec is 0.6km at Nabeta shot point. 3) The velocity Vp of the intermediate layer is respected to be 3.0km/sec, but not sure. 4) The depth of the base with the velocity of Vp=5.0km/sec is 1.8km at Nabeta shot point, but it reduces in the northern part of the Nobi plain. 5) Another base with the velocity of Vp=5.8km/sec is respected in the depth of 3.4km.