Improvement of back-azimuth estimation in real-time by using a single station record

被引：1
作者：
Shunta Noda
Shunroku Yamamoto
Shinji Sato
Naoyasu Iwata
Masahiro Korenaga
Kimitoshi Ashiya
机构：
[1] Railway Technical Research Institute,
来源：
Earth, Planets and Space | 2012年 / 64卷
关键词：
Earthquake early warning; back-azimuth; principal component analysis; single station method; on-site method;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We propose a new approach to improve the accuracy of the back-azimuth estimation in real-time by using a single station record. Compared with the conventional approach in which the length of the time window for the analysis is fixed for all data, the accuracy and speed of the estimation are drastically improved by introducing a variable-length time window which is determined by the first half cycle of the wavelength of the initial P -wave, because this window tends to reduce the influences of trailing scattered waves. The analysis, using the K-NET dataset, shows that the estimation, using this new approach, is improved by 28% and 0.25 s in accuracy and speed, respectively.
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页码：305 / 308
页数：3
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