一种震相拾取误差的自动判别和计算方法
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摘要
本文给出了一个主要用于深地震测深数据的震相识别误差(不确定性)的判别和计算方法.该方法集中讨论从记录截面拾取震相这一过程所引起的判别误差.以震相前后一定时窗内的地震记录振幅的均方根之比为判别依据,找出误差分布范围并给出走时误差与振幅比的分级相关函数.由此,当震相确定后,计算程序将根据记录数据自动算出识别误差.实践证明该方法不仅更加客观真实、方便快捷,而且为今后震相提取工作的进一步科学规范打下了基础.
We give a method for use as the data of deep seismic sounding which identifies and calculates the uncertainty automatically in phase picking.Our attention is concentrated on discussing the identifying uncertainty in the process of picking phase from recording section.It is based on the around ratio of root mean square of oscillation amplitudes of a phase in a certainty window of time,the distribution of uncertainty is found and the correlation function of uncertainty with ratio of amplitude are given.With this method,the programme can calculate the uncertainty automatically when the phases in the recorders are confirmed.Our tests bear out that this method is not only more impersonality,convenient and rapid but is making the work of phase picking more scientific and canonical.
We give a method for use as the data of deep seismic sounding which identifies and calculates the uncertainty automatically in phase picking.Our attention is concentrated on discussing the identifying uncertainty in the process of picking phase from recording section.It is based on the around ratio of root mean square of oscillation amplitudes of a phase in a certainty window of time,the distribution of uncertainty is found and the correlation function of uncertainty with ratio of amplitude are given.With this method,the programme can calculate the uncertainty automatically when the phases in the recorders are confirmed.Our tests bear out that this method is not only more impersonality,convenient and rapid but is making the work of phase picking more scientific and canonical.
引文
[1]张军华吕宁田连玉,等.地震资料去噪方法技术综合评述[J].地球物理学进展,2006,21(2),546~553.
[2]Youxue W,Walter D M,Xuecheng Y,Robert G C.The crus-tal structure from the Altai Mountains to the Altyn Tagh faultnorthwest China[J].J.Geophys.Res.,2003,108:ESE 7.
[3]赵金仁李松林张先康,等.青藏高原东北缘莫霍界面的三维空间构造特征[J],地球物理学报,2005,48(1),78~85.
[4]张中杰白志明王椿镛,等.冈瓦纳和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例[J].中国科学(D),2005,35(5):387~392.
[5]赵金仁张先康张成科,等.利用宽角反射/折射和深反射探测剖面揭示三河一平谷大震区深部结构特征[J],地球物理学报,2004,47(4),646~65.
[6]刘福田徐佩芬刘劲松,等.大陆俯冲带的地壳速度结构-东大别山造山带深地震宽角反射/折射研究[J].地球物理学报,2003,46(3):366~372.
[7]张先康赵金仁张成科,等.帕米尔东北侧地壳结构研究[J].地球物理学报,2002,45(5):665~671.
[8]刘志,张先康,周雪松,等.帕米尔东北侧地壳物性结构及其发震环境探讨[J],地震学报,2003,25(3):242-249.
[9]Tom P,Ray E W,Michael A F.Three-dimensional velocitystructure of Siletzia and other accreted terranes in the Cascadiaforearc of Washington[J].J.Geophys.Res.,1999,104:18015~18039.
[10]Robert H C,Wakter D M.Two-Dimensional velocity struc-ture along the synclinal axis of the great valley,California[J].Bull.Seism.Soc.Am.1986,76:1305~1322.
[11]王夫运张先康杨卓欣.用地震走时反演长白山天池火山地区的地壳二维结构[J].地震学报,2002,24(2):144~152.
[12]刘志张先康王夫运,等.用地震走时反演计算长白山天池火山区二维地壳泊松比[J].地震学报,2005,27(3):324~331.
[13]Zelt C A,Forsyth D A.Modeling wide-angle seismic data forcrustal structure:Southeastern Grenville province[J].J.Geophys.Res.,1994,99:11687~11704.
[14]白志明,王椿镛.云南遮放一宾川和孟连一马龙宽角地震剖面的层析成像研究[J].地球物理学报,2004,47(2):257~26.
[2]Youxue W,Walter D M,Xuecheng Y,Robert G C.The crus-tal structure from the Altai Mountains to the Altyn Tagh faultnorthwest China[J].J.Geophys.Res.,2003,108:ESE 7.
[3]赵金仁李松林张先康,等.青藏高原东北缘莫霍界面的三维空间构造特征[J],地球物理学报,2005,48(1),78~85.
[4]张中杰白志明王椿镛,等.冈瓦纳和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例[J].中国科学(D),2005,35(5):387~392.
[5]赵金仁张先康张成科,等.利用宽角反射/折射和深反射探测剖面揭示三河一平谷大震区深部结构特征[J],地球物理学报,2004,47(4),646~65.
[6]刘福田徐佩芬刘劲松,等.大陆俯冲带的地壳速度结构-东大别山造山带深地震宽角反射/折射研究[J].地球物理学报,2003,46(3):366~372.
[7]张先康赵金仁张成科,等.帕米尔东北侧地壳结构研究[J].地球物理学报,2002,45(5):665~671.
[8]刘志,张先康,周雪松,等.帕米尔东北侧地壳物性结构及其发震环境探讨[J],地震学报,2003,25(3):242-249.
[9]Tom P,Ray E W,Michael A F.Three-dimensional velocitystructure of Siletzia and other accreted terranes in the Cascadiaforearc of Washington[J].J.Geophys.Res.,1999,104:18015~18039.
[10]Robert H C,Wakter D M.Two-Dimensional velocity struc-ture along the synclinal axis of the great valley,California[J].Bull.Seism.Soc.Am.1986,76:1305~1322.
[11]王夫运张先康杨卓欣.用地震走时反演长白山天池火山地区的地壳二维结构[J].地震学报,2002,24(2):144~152.
[12]刘志张先康王夫运,等.用地震走时反演计算长白山天池火山区二维地壳泊松比[J].地震学报,2005,27(3):324~331.
[13]Zelt C A,Forsyth D A.Modeling wide-angle seismic data forcrustal structure:Southeastern Grenville province[J].J.Geophys.Res.,1994,99:11687~11704.
[14]白志明,王椿镛.云南遮放一宾川和孟连一马龙宽角地震剖面的层析成像研究[J].地球物理学报,2004,47(2):257~26.
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