形变速率累加法在青藏块体东北缘跨断层水准资料中的应用
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摘要
运用形变速率累加法对青藏决体东北缘积累近30年的6个跨断层流动水准场地观测资料进行了分析,讨论了异常信息提取的经验和方法,搜集并分析了各场地周围400 km范围内的震例,获得了形变速率累加法的应用经验与前兆异常特征:①异常累加图比原始曲线图在异常的识别上更加突出和直观;②该方法只对超出控制限较连续的异常点残差进行累加,发生间隔较长的异常点则不进行累加计算;③从异常开始到发生地震的时间上得知,该方法可作为地震中期预报指标。
Six cross-fault leveling data of thirty years in northeastern margins of Qinghai-Tibet block with the method of Deformation Rate Accumulation are analyzed,and the experience and method for extracting anomaly information are discussed,the relevant earthquake cases within 400 km are gathered and analyzed,the experience and characteristics of deformation rate accumulation show: ①Anomaly accumulation chart is more prominent and intuitive than primary curve;②Only out-of-range and continuous anomaly data is cumulated,and discontinuous anomaly data isn't cumulated;③From the time that beginning of anomaly to the earthquakes,this method can be the medium-term indicator of the earthquake prediction.
Six cross-fault leveling data of thirty years in northeastern margins of Qinghai-Tibet block with the method of Deformation Rate Accumulation are analyzed,and the experience and method for extracting anomaly information are discussed,the relevant earthquake cases within 400 km are gathered and analyzed,the experience and characteristics of deformation rate accumulation show: ①Anomaly accumulation chart is more prominent and intuitive than primary curve;②Only out-of-range and continuous anomaly data is cumulated,and discontinuous anomaly data isn't cumulated;③From the time that beginning of anomaly to the earthquakes,this method can be the medium-term indicator of the earthquake prediction.
引文
[1]张希,江在森,王双绪,等.断层形变的应变强度比动态图像与震例综合研究[J].地壳形变与地震,2001,21(2):37-42.
[2]张希,薛富平,王双绪,等.大姚、民乐—山丹地震前的中短期前兆[J].大地测量与地球动力学,2004,24(4):57-63.
[3]刘冠中,蒋靖祥,王建军,等.跨断层定点形变观测资料“速率累加分析”及其异常识别初步提取方法[J].内陆地震,2007,21(3):230-237.
[4]张希,薛富平,王继英,等.青藏块体东北缘主要断裂带断层形变时序特征与强震关系[J].地震研究,2009,32(1):1-5.
[5]车兆宏,刘善华,刘天海.用流动形变观测判定强震地点的研究[J].地壳形变与地震,1996,16(1):46-51.
[6]江在森,祝意青.永登5.8级地震孕育发生过程中的断层变形与重力场动态图象特征[J].地震学报,1998,20(3):262-271.
[7]江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001:44-46,87-105.
[8]王双绪,江在森,陈文胜,等.景泰5.9级地震的断层形变异常及中短期预报[J].地震学报,2001,23(2):151-158.
[9]牛安福,李旭东,吴静,等.地壳变形异常的AF值综合检验方法与在地震预报中的应用[J].地震学报,1998,20(4):403-408.
[10]薄万举,谢觉民,罗三明.前兆信息提取的一种新方法—斜率差信息法[J].地震学报,2001,23(2):159-166.
[11]薄万举,高福旺.地倾斜异常的一个特征及其应用[J].地震,2005,25(3):91-94.
[12]杨立明,刘小凤.祁连山地震带地震短期综合预报方案研究[J].西北地震学报,2006,28(3):193-203.
[13]张晓清,张晓香,秦松涛,等.短期前兆综合异常方法在青藏高原北部地区的应用—以兴海地震为例[J].西北地震学报,2008,30(2):179-183.
[14]陈玉华,董治平,程建武,等.昆仑山口西8.1级地震异常综合特点及孕育过程初步探讨[J].地震地质,2009,31(2):363-370.
[2]张希,薛富平,王双绪,等.大姚、民乐—山丹地震前的中短期前兆[J].大地测量与地球动力学,2004,24(4):57-63.
[3]刘冠中,蒋靖祥,王建军,等.跨断层定点形变观测资料“速率累加分析”及其异常识别初步提取方法[J].内陆地震,2007,21(3):230-237.
[4]张希,薛富平,王继英,等.青藏块体东北缘主要断裂带断层形变时序特征与强震关系[J].地震研究,2009,32(1):1-5.
[5]车兆宏,刘善华,刘天海.用流动形变观测判定强震地点的研究[J].地壳形变与地震,1996,16(1):46-51.
[6]江在森,祝意青.永登5.8级地震孕育发生过程中的断层变形与重力场动态图象特征[J].地震学报,1998,20(3):262-271.
[7]江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001:44-46,87-105.
[8]王双绪,江在森,陈文胜,等.景泰5.9级地震的断层形变异常及中短期预报[J].地震学报,2001,23(2):151-158.
[9]牛安福,李旭东,吴静,等.地壳变形异常的AF值综合检验方法与在地震预报中的应用[J].地震学报,1998,20(4):403-408.
[10]薄万举,谢觉民,罗三明.前兆信息提取的一种新方法—斜率差信息法[J].地震学报,2001,23(2):159-166.
[11]薄万举,高福旺.地倾斜异常的一个特征及其应用[J].地震,2005,25(3):91-94.
[12]杨立明,刘小凤.祁连山地震带地震短期综合预报方案研究[J].西北地震学报,2006,28(3):193-203.
[13]张晓清,张晓香,秦松涛,等.短期前兆综合异常方法在青藏高原北部地区的应用—以兴海地震为例[J].西北地震学报,2008,30(2):179-183.
[14]陈玉华,董治平,程建武,等.昆仑山口西8.1级地震异常综合特点及孕育过程初步探讨[J].地震地质,2009,31(2):363-370.
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