我们采了19个沂沭断裂带断层泥样品,测定了断层泥样品三个方向(x,y,z)上的纵波速度(Vpx,Vpy,Vpz)。其中x为断层走向,y垂直于断层面,z为铅直向。根据测量结果表明,该区的大震危险性趋于减小。 We collected 19 tombs from the Yishu fault zone and measured the P-wave velocities (Vpx, Vpy, Vpz) in three directions (x, y, z) of the fault samples. Where x is the strike of the fault, y is perpendicular to the fault plane and z is the vertical direction. According to the measurement results, the danger of large earthquakes in this area tends to decrease.