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1966年3月22日邢台7.2级地震极震区的人工爆炸地震波场十分复杂。其运动学和动力学特征表明,沿人工爆炸测线地区的深处存在着许多深断裂,且将全测线切割成为五个块段,断裂面常延伸到莫霍界面和上地幔顶部的坚硬介质。极震区则为更特殊的块段结构。 极震区人工爆炸地震波的视速度V~*、视周期T~*、界面速度V_d、介质对能量的吸收系数α~*均有异常的变化,是一个断裂错综分布,宽约10—20公里的破碎地带。 7.2级地震震中区下面存在着两组深大断裂,且在此汇集。在震源深度附近的介质中,局部水平错动可达4公里左右,上地幔顶部在此隆起。
March 22, 1966 Xingtai M7.2 Earthquake Earthquake Artificial Explosion Seismic wave field is very complicated. The kinematic and kinetic characteristics show that there are many deep faults along the depth of the line of artificial explosions, and the whole survey line is cut into five blocks. The fracture surface often extends to the top of the Moho interface and the upper mantle medium. Seismic zone is more special block structure. The seismic velocity V ~ *, the apparent period T ~ *, the interface velocity V_d, and the absorption coefficient α ~ * of the medium in the seismic zone have anomalous changes. It is a rupture distribution with a width of 10-20 km Broken zone. There are two groups of deep faults below the epicentral region of the magnitude 7.2 earthquake, where they converge. In the media near the focal depth, the local horizontal dislocation can reach about 4 km and the top of the upper mantle rises.