In this study, attenuation relationships are proposed to more accurately predict ground motions in the southernmost part of the Arabian Shield in the Jazan Region of Saudi Arabia. A data set composed of 72 earthquakes, with normal to strike-slip focal mechanisms over a local magnitude range of 2.0–5.1 and a distance range of 5–200 km, was used to investigate the predictive attenuation relationship of the peak ground motion as a function of the hypocentral distance and local magnitude. To obtain the space parameters of the empirical relationships, non-linear regression was performed over a hypocentral distance range of 4–200 km. The means of 638 peak ground acceleration (PGA) and peak ground velocity (PGV) values calculated from the records of the horizontal components were used to derive the predictive relationships of the earthquake ground motions. The relationships accounted for the site-correlation coefficient but not for the earthquake source implications. The derived predictive attenuation relationships for PGV and PGA are

respectively. These new relationships were compared to the grand-motion prediction equation published for western Saudi Arabia and indicate good agreement with the only data set of observed ground motions available for an M_L 4.9 earthquake that occurred in 2014 in southwestern Saudi Arabia, implying that the developed relationship can be used to generate earthquake shaking maps within a few minutes of the event based on prior information on magnitudes and hypocentral distances taking into considerations the local site characteristics.

在这项研究中，提出了衰减关系以更准确地预测沙特阿拉伯Jazan地区阿拉伯盾最南端的地面运动。一个由72个地震组成的数据集，具有在2.0–5.1的本地震级范围和5–200 km的距离范围内的法线至走滑震源机制，用于研究峰值地面运动的预测衰减关系，作为一个地震活动。下心距和局部幅度的函数。为了获得经验关系的空间参数，在4–200 km的震中距离范围内进行了非线性回归。根据水平分量的记录计算出的638峰值地面加速度（PGA）和峰值地面速度（PGV）值的平均值被用于得出地震地面运动的预测关系。这些关系说明了站点相关系数，但没有说明地震源的含义。推导的PGV和PGA的预测衰减关系为

分别。这些新的关系与沙特阿拉伯西部发布的大运动预测方程进行了比较，表明与2014年发生在沙特阿拉伯西南部的M _L 4.9地震的唯一观测到的地面运动数据集有很好的一致性，这表明发达的可以在事件发生后的几分钟内，根据先前的有关震级和震中距离的信息，并考虑到本地场地的特征，利用这种关系生成地震震荡图。