尼泊尔M_S8.1地震的形变同震响应

Coseismic Deformation Effect of the Nepal M_S8.1 Earthquake

通过对华北地区洞体应变、钻孔应变以及倾斜观测资料的统计分析,将尼泊尔M_S8.1地震引起的同震波动幅度和初动方向进行了归纳总结,并与其它观测手段的结果进行对比分析。结果表明:华北地区应变观测资料的EW向压性初动主要集中在EW向的断裂附近,张性初动变化则主要集中在NE向的断裂附近,NS向同震变化主要是以张性初动为主;华北地区倾斜观测EW向的同震变化主要是以西倾初动为主,NS向的同震变化主要是以南倾初动为主,反映了尼泊尔强震震中以北地区向南运动的弹性响应过程。

Based on the data of cave strain, borehole strain and tilt observations on North China, the first motion direction and volatility caused by Nepal Ms8. 1 earthquake are summarized, and compared with the results of other observing instruments. The results show that in North China the pressure of the first mo- tion of EW strain observations is mainly concentrated in the vicinity of the east-west fault, while the ten- sion of the first motion is mainly concentrated in the north-east fault nearby; the NS coseismic change is tension of the first motion. Coseismic ward, while coseismic changes of NS the north of epicenter of Nepal earthq changes of EW tilt observations in North China mainly tilt are west- tilt observations mainly tilt are southward. This results show that uake moves southward and its strain have been released.