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利用新型断层形变三维观测系统的垂直向观测结果,研究了两年以来7.0级以上强远震在非发震断层上的同震响应特征.结果表明,非发震断层体垂直向同震形变的延迟时间、同震位移最大振幅、振动持续时间等特征与地震震级、震中距等之间存在密切联系.断层体垂直向同震形变延迟时间与震中距线性正相关,发生地震同震形变的响应速度约为5.5km/s,反映了在上层花岗岩地层中面波的传播速度;同震位移最大振幅和震中距的对数、震级之间具有明显线性关系,震级越大,同震位移的最大振幅越大;地震震级是断层体垂直同震形变振动持续时间的主要影响因素,震级越大,同震形变振动持续时间越长.根据断层仪观测数据推算得到的断层体垂直向同震形变延迟时间、同震位移最大振幅、振动持续时间的经验计算公式,对于地震同震形变研究具有一定意义.
Based on the vertical observation results of the new three-dimensional system of fault deformation, the coseismic response characteristics of non-seismogenic faults above 7.0 in two years are studied. The results show that the vertical coseismic deformation of non-seismogenic faults The delay time, the maximum amplitude of coseismic displacement, the duration of vibration and other characteristics are closely related to the magnitude and epicentral distance of the earthquake, etc. The vertical coseismic deformation delay time of the fault body is positively correlated with the epicentral distance linearly, and the response of the earthquake coseismic deformation The velocity is about 5.5km / s, which reflects the surface wave propagation velocity in the upper granite strata. The logarithm of the maximum amplitude and the epicentral distance of coseismic displacements has a clear linear relationship with the magnitude. The larger the magnitude and the largest coseismic displacement The larger the amplitude is, the larger the magnitude of the earthquake is, and the longer the duration of coseismic deformation and vibration, the longer the vertical coseismic deformation of the fault body is derived from the tomographic data Time, the maximum amplitude of the coseismic displacement and the empirical formula of the duration of the vibration have certain significance for the study of earthquake coseismic deformation.