【摘要】 钻孔应变仪的观测过程中发现潮汐应变响应存在方向各向异性,推测是受到台站附近断层影响导致的。我们对此展开数值模拟研究,讨论软弱断层对潮汐变形传播的影响。我们的研究结果证实了软弱断层的存在确实能够产生能够观测到的各向异性现象。同时我们还发现其各向异性变化对断层弹性参数较为敏感。观测到的部分地震震前反映固体潮应变各向异性的潮汐因子"玫瑰图"变化有可能是由于台站附近断层在震前的性质变化引起的。更多还原

【Abstract】 During borehole strain observation,anisotropy of solid-tidal strain was discovered,which was probably related to faults near the station.Based on this,we carried out a simulation study,and discussed how weak faults influence tidal-deformation propagation.During our research,we found out that week faults could cause this anisotropy observed.At the same time,we found out that the changing of anisotropy was sensitive to the elastic property change of the fault zones.Anisotropy change observed before earthquake might due to the property change of the faults.更多还原