Attenuation of earthquake ground motion in Japan including deep focus events
Attenuation of earthquake ground motion in Japan including deep focus events
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日本地震地面运动的衰减，包括深源事件
DOI：
10.1785/bssa0850051343
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发表时间：
1995
影响因子：
3
通讯作者：
F. Yamazaki
中科院分区：
文献类型：
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作者：
G. Molas;F. Yamazaki
本文提出了日本地面峰值加速度和速度的新衰减方程。方程是使用新的JMA-87型加速度计记录的大量数据导出的，它不需要旧的SMAC型加速度计那样的仪器校正。深度达200公里的地震被用来使方程适用于俯冲带地区，这在日本很常见。深度和当地的网站上的衰减的影响被认为是同时与距离依赖性和幅度依赖性使用一个两阶段的回归过程中分离的幅度依赖性的距离依赖性。由于所得到的正规方程组变得奇异，提出了一种迭代偏回归算法。结果表明，对于相同的震级和距离，峰值地面运动随着深度的增加而增加。站系数相对于相应的土类分类的变化是相当广泛的。峰值地面加速度的车站系数被认为是弱相关的一般土壤分类，而一个较强的相关性被发现的峰值地面速度。得到的衰减关系式为：log 10 PGA =0.206+0.477MJ− log 10 r − 0.00144r − 0.00144r+0.00311h+cia，log 10 PGV =−1.769+0.628MJ− log 10 r −0.00130r−0.00144r+0.00222h+civ，其中PGA（cm/sec 2）和PGV（cm/sec）是两个水平分量的峰值加速度和速度中较大的一个，MJ为JMA震级，r为距断层破裂最近的距离，h为深度，ci为记录台站的台站系数。JMA台站的系数的平均值由ci = 0给出。
New attenuation equations for peak ground acceleration and velocity for Japan are developed. The equations are derived using extensive data recorded by the new JMA-87-type accelerometers, which do not require instrumental corrections that the older SMAC-type accelerometers do. Earthquakes with depths up to 200 km are used to make the equation applicable to subduction zone regions, which are common in Japan. Effects of depth and local site on the attenuation are considered simultaneously with the distance dependence and magnitude dependence using a two-stage regression procedure to separate the magnitude dependence from the distance dependence. Since the resulting normal equations become singular, an iterative partial regression algorithm is proposed. It is found that for the same magnitude and distance, peak ground motion increases as depth increases. The variation of the station coefficients with respect to the corresponding soil-type classification is quite wide. The station coefficients for the peak ground acceleration are found to be weakly correlated with the general soil classification, while a stronger correlation was found for the peak ground velocity. The resulting attenuation relations are given by log10PGA=0.206+0.477MJ−log10r−0.00144r−0.00144r+0.00311h+cia,log10PGV=−1.769+0.628MJ−log10r−0.00130r−0.00144r+0.00222h+civ, where PGA (cm/sec2) and PGV (cm/sec) are the larger of the peak accelerations and velocities from two horizontal components, MJ is the JMA magnitude, r is the closest distance to the fault rupture, h is the depth, and ci is the station coefficient of the recording station. The mean of the coefficients of the JMA stations is given by ci = 0.
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DOI：
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发表时间：
2011
期刊：
影响因子：
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作者：
通讯作者：
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