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对北美洲东部在10≤R≤500km的距离范围4.0≤M≤7.25地震的地面运动得到了预测关系。所得到的参数是0.5～20Hz频率的反应谱、峰值加速度和速度。预测关系是以经验关系为基础的地面运动随机模型得到的。我们得到的关系不同于以往工作的地方在于改进了输入参数经验性的定义和经验性的最终结果的证实。通过论证说明这些关系与M4～5地震的地面运动一致。要满足要求地判断较高震级时的这种关系还缺乏足够的数据,尽管它们与萨格奈(M5.8)和纳汉尼(M6.8)地震中得到的数据一致。对于大到M6.8的地震,重要模型参数由经验数据来约束。
The ground motion of the east of North America in the range of 4.0≤M≤7.25 with a range of 10≤R≤500 km is predicted. The resulting parameters are the response spectrum at 0.5-20 Hz, peak acceleration and velocity. Predictive relationships are derived from stochastic ground motion models based on empirical relationships. The difference we get from previous work lies in improving the empirical definition of the input parameters and the empirical end result. The results show that these relations are consistent with the ground motions of M4 ~ 5 earthquakes. There is also a lack of sufficient data to meet this requirement for higher magnitudes, although they are consistent with the data obtained from the Sagnai (M5.8) and Nahani (M6.8) earthquakes. For earthquakes as large as M6.8, the important model parameters are constrained by empirical data.