Scaling Relations of Earthquakes That Occurred in the Upper Part of the Philippine Sea Plate beneath the Kanto Region, Japan, Estimated by Means of Borehole Recordings
Scaling Relations of Earthquakes That Occurred in the Upper Part of the Philippine Sea Plate beneath the Kanto Region, Japan, Estimated by Means of Borehole Recordings
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通过钻孔记录估算日本关东地区下方菲律宾海板块上部发生的地震的尺度关系
DOI：
10.1785/0120010134
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发表时间：
2002
影响因子：
3
通讯作者：
Miho Ohike
中科院分区：
文献类型：
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作者：
S. Kinoshita;Miho Ohike
利用日本中部关东地区27个钻孔和7个地面硬岩台站的634条强震记录，研究了M0 = 1013 ~ 1018（Nm）的94次板间地震和74次板内地震的SH波加速度源谱。不同的标度关系控制板间和板内事件的估计加速度源谱。板间事件的估计加速度源谱与障碍物模型的谱相似，板内事件的谱在拐角频率附近显示出特征性的凸起。对于相同的地震矩，板间地震的加速度源谱幅值总体上大于板内地震的加速度源谱幅值。地震矩，M0，拐角频率，fc，和地震能量，E，从估计的加速度源谱为每个地震进行评估。地震矩M0与f_{c}^{-3}几乎成正比。地震能量与地震矩之比E/M0 = 1.15-12.9 × 10 - 5，板内地震与板间地震无明显差异。这意味着，对于具有相同地震矩的板间和板内事件，估计的速度源谱几乎相同。视应力σ A = E/M0对地震矩的依赖性较弱，主要取决于构造背景。表观应力降2σ A与Brune 9 s应力降几乎成正比。
Acceleration source spectra of SH waves for 94 interplate and 74 intraplate earthquakes with a moment range of M 0 = 10 13 –10 18 (N m) are investigated using 634 strong-motion records obtained at 27 borehole and 7 surface hard-rock stations installed in the Kanto region, central Japan. Different scaling relations control the estimated acceleration source spectra for interplate and intraplate events. The estimated acceleration source spectra of interplate events are similar to the spectra expected from the barrier model, and those of intraplate events show a characteristic bump around the corner frequency. The amplitude of acceleration source spectrum of interplate events is, on the whole, larger than that of intraplate events for the same seismic moment. Seismic moment, M 0 , corner frequency, f c , and seismic energy, E , are evaluated from the estimated acceleration source spectrum for each earthquake. The seismic moment, M 0 , is nearly proportional to \(f_{c}^{-3}\) . The ratio of seismic energy to seismic moment is E/M 0 = 1.15–12.9 × 10 –5 for all events without a significant difference between interplate and intraplate earthquakes. This means that the estimated velocity source spectra for interplate and intraplate events with the same seismic moment are nearly identical. The dependence of apparent stress, σ A = E/M 0 , on seismic moment is weak and depends on tectonic setting. Apparent stress drop, 2σ A , is almost proportional to the Brune9s stress drop.
DOI：
--
发表时间：
1975-10
期刊：
--
影响因子：
--
作者：
H. Kanamori;D. L. Anderson
通讯作者：
H. Kanamori;D. L. Anderson