文章基本信息

标题：Real-time seismic intensity prediction using frequency-dependent site amplification factors
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作者：Masashi Ogiso ; Shigeki Aoki ; Mitsuyuki Hoshiba 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2016
卷号：68
期号：1
页码：1-15
DOI：10.1186/s40623-016-0467-4
出版社：Springer Verlag
摘要：A promising approach for the next generation of earthquake early warning system is based on predicting ground motion directly from observed ground motion, without any information of hypocenter.In this study, we predicted seismic intensity at the target stations from the observed ground motion at adjacent stations, employing two different methods of correction for site amplification factors.The first method was frequency-dependent correction prediction, in which we used a digital causal filter to correct the site amplification for the observed waveform in the time domain.The second method was scalar correction, in which we used average differences in seismic intensity between two stations for the site amplification correction.Results from thousands of station pairs that covered almost all of Japan showed that seismic intensity prediction with frequency-dependent correction prediction was more accurate than prediction with scalar correction.Frequency-dependent correction for site amplification in the time domain may lead to more accurate prediction of ground motion in real time.
关键词：Site amplification factor; Real-time correction; Seismic intensity prediction; Earthquake early warning