sPn震相计算近震震源深度研究

英文篇名：The summarization of research and application of determination of focal depth with the sPn phase
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：吴微微 ; 苏金蓉 ; 魏娅玲
英文作者：Wu Weiwei ; Su Jinrong and Wei Yaling (Earthquake Administration of Sichuan Province ; Chengdu 610041.China)
中文关键词：sPn震相 ; 壳内地震 ; 浅源地震 ; 到时差 ; 震源深度
英文关键词：sPn phase ; withi-crust earthquake ; shallow earthquake ; arrival time difference ; focal depth
出版日期：2012-10-25
机构：四川省地震局;
年：2012
期：Z2
出版单位：地震地磁观测与研究

摘要

震源深度是描述震源信息的基本参数之一,也是目前最难测准的参数之一。近震深度震相sPn与Pn震相到时差与震中距无关,是测定地壳内地震震源深度的主要依据之一。sPn与Pn到时差测定地壳内近震深度的方法简洁、准确,可以在日常地震速报中应用。
Depth of focus is a very important earthquake parameter.In this article the preliminary exploration to the determination of focal depth of near earthquake by means of the arrival time difference between the sPn and Pn phases.This method is simple,quick and accurate. The sPn is of great significance for our study to determine focal depth of the within-crust earthquakes that the arrival time difference between sPn and Pn is independent of epicentral distance.This method of analysis and determination is simple and accurate,so it can be extend to the regional earthquake analyzing in the seismic network daily work.

引文

房明山,杜安陆,董孝平,等.用sPn震相测定震源深度[J].地震地磁观测与研究,1995,16(5):13—18.
    高立新,刘芳,赵蒙生,等.用sPn震相计算震源深度的初步分析与应用[J].西北地震学报,2007,29(3):213—218.
    洪星,杨贵,林仙坎,等.:sPn震相的多台同时测定法[J].地震地磁观测与研究,2006,27(3):77-80.
    任克新,邹立晔,刘瑞丰,等.用sPn计算内蒙地震的震源深度[J].地震地磁观测与研究,2004,25(3):24—31.
    杨贵,洪星.用sPn震相测定1999年9月21日台湾集集地震震源深度[J].福建地震,2005,21(4):7—9.
    张诚.地震分析基础[M].北京:地震出版社,1 986.
    张国明,汪素云,李丽,等.中国大陆地震震源深度及其构造含义[J].科学通报,2002,47(9):663-668.
    张瑞青,吴庆举,李永华,等.汶川中强余震震源深度的确定及其意义[J].中国科学D辑:地球科学,2008,38(10):1234—1241
    朱丽霞,赵培林.由sPn波确定观测台地区的地壳厚度[J].地震地磁观测与研究,1991,12(2):34—38.
    Chen W P,Nabelek J L,Molnar P,et al.An intermediate depth earthquake beneath Tibet:source characteristics of the event of September 14,1976[J].J GeophysRes,1981,86:2 863-2876.
    Kind R.Observation of sPn from Swabian Alb Earthquakes at the GRF Array[J].Journal of Geophysics,1979,45:337-340.
    Zhao L S,Helmberger D V.Geophysical implications form relocations of Tibetan earthquake:hot lithosphere[J].Geophys Res Lett,1991,18(12):2205-2208.