九江-瑞昌5.7级地震余震尾波Qc值分析
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摘要
对江西九江瑞昌5.7级地震(2005年11月26日)的余震尾波Qc值作了分析,发现Qc值偏低,在64.1±21.5范围内波动,与震级基本不相关。这表明从该主震震中到流动台站所决定的衰减椭圆区域与北东向的瑞昌发震断裂带关系密切,推测其能量大释放已经基本完成,目前该震源体内正处于应力调整阶段。
The Qc value of the aftershock’s coda waves of Ms5.7 earthquake in Jiujiang-Ruichang, Jiangxi province recorded by single station are analyzed. The results show that the Qc values are too lower(64.1±21.5) and have little correlation with the magnitude. The attenuation ellipse area between the mobile station and the epicenter of main earthquake is related closely with the NE trending Ruichang seismogenic fault zone. The energy erupt perhaps have already ended, and the seismic source area is in the stress adjustment process,now.
The Qc value of the aftershock’s coda waves of Ms5.7 earthquake in Jiujiang-Ruichang, Jiangxi province recorded by single station are analyzed. The results show that the Qc values are too lower(64.1±21.5) and have little correlation with the magnitude. The attenuation ellipse area between the mobile station and the epicenter of main earthquake is related closely with the NE trending Ruichang seismogenic fault zone. The energy erupt perhaps have already ended, and the seismic source area is in the stress adjustment process,now.
引文
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①湖北省地震局.黄石长江公路大桥场址工程地震研究报告,1998.
2李白基,秦嘉政,钱晓东,等.云南姚安地区的尾波衰减[J].地震学报,2004,26(1):47～52.2LiBaiji,QinJiazheng,QianXiaodong,etal.ThecodaattenuationoftheYaoanareainYunnanprovince[J].ActaSeismologicaSinica,2004,26(1):47-52.(inChinese)
3李白基,秦嘉政,谢庆茵,等.云南武定1995年地震余震尾波Qc[J].地震地磁观测与研究,2000,21(2):1～6.3LiBaiji,QinJiazheng,XieQingyin,etal.TheQc(f)ofcodafromtheaftershocksofthe1995WudingearthquakeinYunnanprovince[J].SeismologicalandGeomagneticObservationandResearch,2000,21(2):1-6.(inChinese)
4王伟君,刘杰.1999年岫岩地震序列尾波Qc的变化过程[J].地震,2004,24(4):37～44.4WangWeijunandLiuJie.TemporalprocessofSCodaQofXiuyanearthquakesequencein1999[J].Earthquake,2004,24(4):37-44.(inChinese)
5王勤彩,郑斯华,刁桂苓,等.张北地震序列的尾波Qc值研究[J].防灾减灾工程学报,2004,24(1):37～40.5WangQincai,ZhengSihua,DiaoGuiling,etal.TheCodawaveQcvalueofZhangbeiearthquakesequence[J].JournalofDisasterPreventionandMitigationEngineering,2004,24(1):37-40.(inChinese)
6赵振,李欣.海城地震震源区的地震尾波衰减特征[J].中国地震,1995,11(1):62～71.6ZhaoZhenandLiXin.ThefeaturesofcodaattenuationinthesourceregionoftheHaichengearthquake[J].Earthquakeresearchinchina,1995,11(1):62-71.(inChinese)
7周焕鹏.菏泽5.9级地震前后地震尾波的衰减特征[J].华北地震科学,1990,8(4):47～55.7ZhouHuanpeng.TheattenuationpropertyforthecodawavebeforeandafterHezeMs5.9earthquake[J].NorthChinaEarthquakeSciences,1990,8(4):47-55.(inChinese)
8AkiKandChouetB.Originofcodawaves:source,attenuation,andscatteringeffects[J].JournalGeophysicalResearch,1975,80(23):3322-3342.
9朱新运,刘杰,张帆.基于Aki模型的近震S波尾波Q值求解及分析软件研制[J].地震研究,2006,29(1):76～80.9ZhuXinyun,LiuJieandZhangFan.DevelopmentofQvaluecalculatingandprocessingsoftwareusingSwavecodainlocalearthquakesbasedonAkimodel[J].JournalofSeismologicalResearch,2006,29(1):76-80.(inChinese)
10秦嘉政,李白基,钱晓东,等.云南武定地震余震近场尾波衰减的区域特征[J].地震学报,2001,23(1):87～97.10QinJiazheng,LiBaiji,QianXiaodong,et.al.RegionalfeaturesofcodaattenuationofaftershocksofWuding,Yunnanearthquakeinnearfield[J].ActaSeismologicaSinica,2001,23(1):87-97.(inChinese)
①湖北省地震局.黄石长江公路大桥场址工程地震研究报告,1998.
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