地震预警中的单台综合定位方法
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摘要
基于日本基盘强震观测网中某个地震事件首个地震台记录的震级在4级以上、震中距为30~100 km的强震数据,运用B-Δ法和Voronoi多边形法相结合的方法计算震中距。结果表明,B-Δ法和Voronoi多边形法相结合计算出的震中距与单用B-Δ法的计算结果相比,单台定位所用时间相同,但其定位精度明显提高。
From the strong motion data at the first station which received seismic signal of a certain event downloaded from KIK-net of Japan,whose magnitude are more than 4 and epicentral distance range from 30 km to 100 km,we computed the epicentral diatance with the combined B-Δ method and Voronoi polygon method.The results show that with the combined method and the calculated epicentral distance can be more accurately than with only B-Δ method as consune the same location time.
From the strong motion data at the first station which received seismic signal of a certain event downloaded from KIK-net of Japan,whose magnitude are more than 4 and epicentral distance range from 30 km to 100 km,we computed the epicentral diatance with the combined B-Δ method and Voronoi polygon method.The results show that with the combined method and the calculated epicentral distance can be more accurately than with only B-Δ method as consune the same location time.
引文
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2 Nakamura Y.On the urgent earthquake detection and alarmsystem(UrEDAS)[R].Proc,9th of World Conference onEarthquake Engineering,1988.
3 Nakamura Y.Earthquake alarm system for Japan railways[J].Japanese Railway Engineering,1989,109:1-7.
4 Wu Y M and Teng TL.A virtual sub-network approach toearthquake early warning[J].Bulletin of the SeismologicalSociety of America,2002,92(5):2 008-2 018.
5 Odaka T,et al.A new method of quickly estimating epicen-tral distance and magnitude from a single seismic record[J].Bulletin of the Seismological Society of America,2003,93(1):526-532.
6 Atsuyuki O,et al.Spatial tessellations:Concepts and applica-tions of voronoi diagrams.2nd ed[M].Hoboken:John Wi-ley,2000.
7马强.地震预警技术研究及应用[D].中国地震局工程力学研究所,2008.(Ma Qiang.Study and application ofearthquake early warning[D].Institute of Engineering Me-chanics,CEA,2008)
8 Andrew B L and R M Allen.Single-Station earthquakecharacterization for early warning[J].Bulletin of the Seis-mological Society of America,2005,95(6):2 029-2 039.
9 Tsukada S,et al.A new method of estimating epicentral dis-tance and magnitude for early earthquake detection:(2)Ap-plication of JMA data[R].ABSTRACTS 2001 Japan Earthand Planetary Science Joint Meeting,2001.
10朱福祥,等.重大工程地震预警初步研究[J].世界地震工程,2002,18(3):32-26.(Zhu Fuxiang,et al.Prelimi-nary study on earthquake early warhing system for signifi-cant infrastructures[J].Word Earthquake Engineering,2002,18(3):32-36
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