陕西形变资料扰动现象分析
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摘要
对陕西6个数字化台站18套仪器近5年资料的分析结果显示:频繁的扰动具有很高的映震能力,每次扰动在400 km内有4级以上或500 km内5级以上的地震发生;汉中台垂直摆,乾县、西安水管仪和宁陕垂直摆对2008年汶川地震的余震有较好的响应;乾县台垂直摆对河津4.8级地震的响应明显。
Through analyzing deformation data in Shanxi province,perturbations frequently appeared before M≥4 earthquake in range of 400 km or M≥5 earthquake in range of 500 km.It is shown in two aspects: 1)response of vertical pendulum in Hanzhong seismostation,water tube tiltmeter at Qianxian station and Xi'an station,vertical pendulum at Ningshan station to large aftershocks of Wenchuan Ms8.0 earthquake,2)response of vertical pendulum at Qianxian station to Hejing Ms4.8 earthquake.
Through analyzing deformation data in Shanxi province,perturbations frequently appeared before M≥4 earthquake in range of 400 km or M≥5 earthquake in range of 500 km.It is shown in two aspects: 1)response of vertical pendulum in Hanzhong seismostation,water tube tiltmeter at Qianxian station and Xi'an station,vertical pendulum at Ningshan station to large aftershocks of Wenchuan Ms8.0 earthquake,2)response of vertical pendulum at Qianxian station to Hejing Ms4.8 earthquake.
引文
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2牛安福.地倾斜变化的突变性及与地震关系的研究[J].地震学报,2003,25(4):441-445.(Niu Anfu.Study onthe sudden changes in ground tilt related to earthquakes[J].Acta Seismologica Sinica,2003,25(4):441-445)
3牛安福,张晶,吉平.强地震引起的同震形变响应[J].内陆地震,2005,19(1):1-7.(Niu Anfu,Zhang Jing,Ji Ping.Coseismic deformation response of strong earthquake[J].Inland Earthquake,2005,19(1):1-7)
4牛安福.地壳形变观测与地震前兆一般性问题的讨论[J].国际地震动态,2007,(6):43-48.(Niu Anfu.Some problems on the ground deformation measurements andearthquake precursors[J].Recent Developments in WorldSeismology,2007,(6):43-48)
5牛安福,等.汶川地震前南北地震带中北段地形变变化特征的研究[J].地震,2009,29(1):100-107.(NiuAnfu,et al.On the characteristics of ground deformation a-nomalies in the middle and northern part of the south-northseismic belt prior to the Wenchuan earthquake[J].Earth-quake,2009,29(1):100-107)
6柯昌安,等.泾阳台短水准异常与地震关系研究[J].大地测量与地球动力学,2009,29(3):34-37.(KeChang’an,et al.Study of relation between anomaly of shortleveling at Jingyang station and earthquakes[J].Journal ofGeodesy and Geodynamics,2009,29(3):34-37)
7张宇翔,罗词建.陕西地震监测台网在汶川地震监测中的应用[J].地震地磁观测与研究,2010,31(5):142-146.(Zhang Yuxiang,Luo Cijian.Seismic monitoring net-work in Shanxi province and the application of its monitoringresults from Wenchuan earthquake[J].Seismological andGeomagnetic Observation and Research,2010,31(5):142-146)
8张宇翔,袁志祥.汶川8.0级地震陕西灾区震害特征分析[J].地震研究,2010,33(3):329-335.(ZhangYuxiang,Yuan Zhixiang.Analysis of the characteristics ofearthquake damages of the Ms8.0 Wenchuan earthquake inthe affected area in Shanxi[J].Journal of Seismological,2010,33(3):329-335)
9中国地震局监测预报司.汶川8.0级地震科学研究报告[M].北京:地震出版社,2009.(Edited by Monitoringand Prediction Department of CEA.Science and research re-port on the Wenchuan Ms8.0 earthquake[M].Beijing:Seismology Press,2009)
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