Studying and understanding the characteristic ground motions of destructive earthquakes is very important in the prevention of earthquake disasters. In this paper, two 2018 Ms 5.0 earthquakes are used as an empirical Green’s function to reproduce the ground motion strength of the 1970 Ms 7.8 Tonghai earthquake. The present paper considers the uncertainties in the numerical simulation, the source model, the asperities, and the initial rupture positions. The obtained peak ground acceleration (PGA), the time history of the acceleration, and the acceleration response spectrum at each station are compared with the ground motion strength at corresponding stations for the Ms 8.0 Wenchuan earthquake to test the reliability of the ground motion simulation. The results show that the PGA of the one-asperity source model is the largest. With an increasing number of asperities, the ground motion strength decreases, and the earthquake duration increases, indicating that an increase in the number of asperities disperses seismic energy. The two-asperity source model is consistent with the real source model of the Tonghai earthquake. The acceleration time history and acceleration response spectrum at each station reflect the characteristics of the ground motion strength of the destructive Tonghai Ms 7.8 earthquake. Thus, reproducing the main ground motion strength characteristics of the Tonghai earthquake by combining the empirical Green's function method with two Ms 5.0 earthquakes is feasible.

研究和理解破坏性地震的特征性地震动对于预防地震灾害非常重要。本文将两次2018年Ms 5.0地震用作格林的经验函数，以再现1970年通海Ms 7.8地震的地面运动强度。本文考虑了数值模拟，源模型，凹凸和初始破裂位置的不确定性。将获得的峰值地面加速度（PGA），加速度的时间历程和每个站点的加速度响应谱与汶川8.0级地震对应站点的地面运动强度进行比较，以测试地面运动模拟的可靠性。结果表明，单生源模型的PGA最大。随着粗糙数量的增加，地震动强度降低，地震持续时间增加，这表明粗糙数量的增加分散了地震能量。二灾源模型与通海地震的真实源模型是一致的。每个站点的加速时间历程和加速响应谱反映了破坏性的通海7.8级地震的地震动强度特征。因此，通过将经验格林函数方法与两次Ms 5.0地震相结合来再现通海地震的主要地震动强度特征是可行的。二灾源模型与通海地震的真实源模型是一致的。每个站点的加速时间历程和加速响应谱反映了破坏性的通海7.8级地震的地震动强度特征。因此，通过将经验格林函数方法与两次Ms 5.0地震相结合来再现通海地震的主要地震动强度特征是可行的。二灾源模型与通海地震的真实源模型是一致的。每个站点的加速时间历程和加速响应谱反映了破坏性的通海7.8级地震的地震动强度特征。因此，通过将经验格林函数方法与两次Ms 5.0地震相结合来再现通海地震的主要地震动强度特征是可行的。