利用重复地震观测重庆巫山地区地壳介质变化
|
摘要
利用波形互相关技术,对重庆数字地震台网记录的巫山地区90次地震波形资料进行相关计算,识别出24对同时被2个地震台站记录且各台波形互相关系数不小于0.8的重复地震对;利用射线追踪方法,对巫山地区重复地震位置做归一化处理,得到所选台站记录地震P波走时差变化,结果显示,在2013年重庆巫山M_L 3.7地震前,建坪、双龙、荆竹地震台记录到该地区短期地壳介质速度有明显升高现象。
Based on the 90 earthquakes recorded in Wushan area recorded by the Chongqing Digital Seismic Network, the correlation calculation of the seismic waveform data was carried out using the waveform cross-correlation technique. It was identified 24 earthquake doubles with waveform correlation coefficient was not less than 0.8 and recorded by 2 stations; The position of repeated earthquakes in Wushan area is normalized by ray tracing method, and the change of P-wave travel time difference of the selected stations is obtained. The results indicate the short-term velocity variation of crustal media appears before Wushan M_L 3.7 earthquake in 2013.
Based on the 90 earthquakes recorded in Wushan area recorded by the Chongqing Digital Seismic Network, the correlation calculation of the seismic waveform data was carried out using the waveform cross-correlation technique. It was identified 24 earthquake doubles with waveform correlation coefficient was not less than 0.8 and recorded by 2 stations; The position of repeated earthquakes in Wushan area is normalized by ray tracing method, and the change of P-wave travel time difference of the selected stations is obtained. The results indicate the short-term velocity variation of crustal media appears before Wushan M_L 3.7 earthquake in 2013.
引文
陈立德.震源硬化模型的理论、实验及观测事实依据[J].地震,2000,20(1):1-9.
董非非,邓辉,郑斌,等.“重复地震”在江西省及邻区测震台网定位精度评价中的应用[J].华北地震科学,2016,34(2):73-78.
李彤霞,钱蕊,付聪,等.利用重复地震研究盖州震群地区介质变化[J].防灾减灾学报,2017,33(3):1-4.
李宇彤,蒋长胜.波形相关意义“重复地震”研究综述[J].中国地震,2011,27(4):335-347.
李宇彤,吴忠良,蒋长胜,等.利用辽宁区域地震台网记录分析“重复地震”[J].地震学报,2008,30(4):383-396.
马晓静,吕作勇.广东地区重复地震识别及其在台网定位评价中的应用[J].华南地震,2017,37(1):22-28.
邵媛媛,王亮,曹凤娟,等.辽宁阜新矿震震源及附近介质变化研究[J].防灾减灾学报,2017,33(4):27-31.
申学林,陈俊华,魏贵春,等.三峡水库巴东地区的介质变化分析[J].长江科学院院报,2010,27(5):92-94.
施行觉,徐果明,靳平,等.岩石的含水饱和度对纵、横波速及衰减影响的实验研究[J].地球物理学报,1995,38(Z1):281-287.
王鹏,郑建常,谭毅培.利用重复地震研究山东乳山地区地壳介质波速变化[J].地震学报,2016,38(5):72-738.
武敏捷,徐平,马士振,等.利用重复地震研究滦县地区的地壳介质变化[J].地震地磁观测与研究,2011,32(5):20-24.
叶秀薇,闻则刚,刘锦,等.利用重复地震研究广东阳江地区地壳介质变化[J].地震,2008,28(4):103-111.
赵旭,李强,蔡晋安,等.三峡库首区最小一维速度模型研究[J].大地测量与地球动力学,2007,27(专刊):1-7.
周龙泉,刘桂萍,马宏生,等.利用重复地震观测地壳介质变化[J].地震,2007,27(3):1-9.
Poupinet G, Ellsworth W L, Frechet J. Monitoring Velocity Variations in the Crust Using Earthquake Doublets:An Application to the Calaveras Fault, California[J]. J Geophys Res, 1984, 89(B7):5 719-5 731.
Schaff D P, Richards P G. Repeating seismic events in China[J]. Science, 2004, 303(5 661):1 176-1 178.
董非非,邓辉,郑斌,等.“重复地震”在江西省及邻区测震台网定位精度评价中的应用[J].华北地震科学,2016,34(2):73-78.
李彤霞,钱蕊,付聪,等.利用重复地震研究盖州震群地区介质变化[J].防灾减灾学报,2017,33(3):1-4.
李宇彤,蒋长胜.波形相关意义“重复地震”研究综述[J].中国地震,2011,27(4):335-347.
李宇彤,吴忠良,蒋长胜,等.利用辽宁区域地震台网记录分析“重复地震”[J].地震学报,2008,30(4):383-396.
马晓静,吕作勇.广东地区重复地震识别及其在台网定位评价中的应用[J].华南地震,2017,37(1):22-28.
邵媛媛,王亮,曹凤娟,等.辽宁阜新矿震震源及附近介质变化研究[J].防灾减灾学报,2017,33(4):27-31.
申学林,陈俊华,魏贵春,等.三峡水库巴东地区的介质变化分析[J].长江科学院院报,2010,27(5):92-94.
施行觉,徐果明,靳平,等.岩石的含水饱和度对纵、横波速及衰减影响的实验研究[J].地球物理学报,1995,38(Z1):281-287.
王鹏,郑建常,谭毅培.利用重复地震研究山东乳山地区地壳介质波速变化[J].地震学报,2016,38(5):72-738.
武敏捷,徐平,马士振,等.利用重复地震研究滦县地区的地壳介质变化[J].地震地磁观测与研究,2011,32(5):20-24.
叶秀薇,闻则刚,刘锦,等.利用重复地震研究广东阳江地区地壳介质变化[J].地震,2008,28(4):103-111.
赵旭,李强,蔡晋安,等.三峡库首区最小一维速度模型研究[J].大地测量与地球动力学,2007,27(专刊):1-7.
周龙泉,刘桂萍,马宏生,等.利用重复地震观测地壳介质变化[J].地震,2007,27(3):1-9.
Poupinet G, Ellsworth W L, Frechet J. Monitoring Velocity Variations in the Crust Using Earthquake Doublets:An Application to the Calaveras Fault, California[J]. J Geophys Res, 1984, 89(B7):5 719-5 731.
Schaff D P, Richards P G. Repeating seismic events in China[J]. Science, 2004, 303(5 661):1 176-1 178.