福建井水位对汶川大震体应变的响应
|
摘要
井水位观测系统可作为一个天然体应变计,把体应变固体潮理论值作为系统的输入,把井水位观测值作为系统的输出,则井水位观测值的维尼迪柯夫调和分析结果即为系统的传递函数。取半日波的M2波的振幅比作为井水位观测系统的灵敏度,其倒数即为格值。在此基础上,可由井水位的分钟值计算出汶川Ms8.0地震激励出的水震波幅度。利用地震仪面波量测出瑞雷面波在径向和垂直向的位移最大幅度及其周期,根据位移散度公式就可计算出汶川地震所激励的地壳体应变波。计算结果表明,瑞雷面波激励出的体应变波比井水位得到的水震波约大1个数量级。
The well-water-level system is a natural body strain gauge.Taking the theoretical earth tide value of body strain as the input of the system and digital observations of well level of the system as the output,the harmonic analysis results of the digital observation of well level computed with Venidikov's harmonic analysis method is transfer function(sensitivity) of the well level system.The paper takes the amplitude factor of wave M2 as the theoretical calibration value η of well level system.The water-level shock wave excited by Wenchuan M s8.0 earthquake is calculated by use of the minute values of water level of five wells in May,2008.Meanwhile,the Rayleigh wave data including the maximum amplitude of radial and vertical displacement and its periods,are recorded by seismograph.Body strain wave excited by Wenchuan earthquake is calculated with displacement divergence formula.The result is the volume strain from seismograph which is high frequency is ten times bigger than the one from well-water-level system which is low frequency.The difference between them is discussed at last.
The well-water-level system is a natural body strain gauge.Taking the theoretical earth tide value of body strain as the input of the system and digital observations of well level of the system as the output,the harmonic analysis results of the digital observation of well level computed with Venidikov's harmonic analysis method is transfer function(sensitivity) of the well level system.The paper takes the amplitude factor of wave M2 as the theoretical calibration value η of well level system.The water-level shock wave excited by Wenchuan M s8.0 earthquake is calculated by use of the minute values of water level of five wells in May,2008.Meanwhile,the Rayleigh wave data including the maximum amplitude of radial and vertical displacement and its periods,are recorded by seismograph.Body strain wave excited by Wenchuan earthquake is calculated with displacement divergence formula.The result is the volume strain from seismograph which is high frequency is ten times bigger than the one from well-water-level system which is low frequency.The difference between them is discussed at last.
引文
1 P.梅尔基奥尔著.杜品仁,等译.吴庆鹏,杜品仁校.行星地球的固体潮[M].北京:科学出版社,1984.
2王吉易,董守玉,陈建民.地下流体地震预报方法[M].北京:地震出版社,1997.
3敬少群,王佳卫.长沙井动水位对台湾集集7.6级地震的震时效应及其机理分析[J].华南地震,2001,21(1):32-37.
4 Hurwitz S and Johnston MJ S.Groundwater level changes ina deep well in response to a magma intrusion event onKilauea Volcano,Hawai'i[J].Geophysical Research Letters,2003,30(22):2 173,ESE10.1-10.4
5 Brodsky E E,et al.A mechanism for sustained groundwaterpressure changes induced by distant earthquakes[J].Jour-nal of Geophysical Reserch,2003,108(B8):2390,doi:1029/2002JB002321,2003,SDE10.1-10.4
6邱永平.宁波地震台水位、地倾斜在印尼8.7、8.5级地震中的同震变化现象[J].内陆地震,2006,20(4):336-341.
7张素欣,杨卫东,张子广.唐山矿井模拟与数字水位的记震能力对比分析[J].西北地震学报,2007,29(2):170-173.
8郑小菁,陈莹.福建数字地下流体网对远处大震映震能力分析[J].国际地震动态,2007,3:31-37.
9曾劲主编.控制工程基础[M].北京:电子工业出版社,2007.
10陆一心主编.现代工程控制理论[M].北京:化学工业出版社,2006.
11北京大学地球物理系,武汉测绘学院大地测量系,中国科学技术大学地球物理教研室编.重力与固体潮[M].北京:地震出版社,1982.
12 Thorne L and Terry C W.Modern global seismology[M].Academic Press,1981.
13曾融生.固体地球物理学[M].北京:科学出版社,1984.
14傅承义.地震波.中国大百科全书(固体地球科学卷)[M].北京:科学出版社,1985.
15 Menahem A and Singhs.Seismic waves and sources[M].New York:Haideberg Belin,Springer-Verlag,1981.
16傅承义,陈运泰,祁贵仲.地球物理学基础[M].北京:科学出版社,1985.
17郭伟国,李玉龙,索涛.应力波基础简明教程[M].西安:西北大学出版社,2007.
2王吉易,董守玉,陈建民.地下流体地震预报方法[M].北京:地震出版社,1997.
3敬少群,王佳卫.长沙井动水位对台湾集集7.6级地震的震时效应及其机理分析[J].华南地震,2001,21(1):32-37.
4 Hurwitz S and Johnston MJ S.Groundwater level changes ina deep well in response to a magma intrusion event onKilauea Volcano,Hawai'i[J].Geophysical Research Letters,2003,30(22):2 173,ESE10.1-10.4
5 Brodsky E E,et al.A mechanism for sustained groundwaterpressure changes induced by distant earthquakes[J].Jour-nal of Geophysical Reserch,2003,108(B8):2390,doi:1029/2002JB002321,2003,SDE10.1-10.4
6邱永平.宁波地震台水位、地倾斜在印尼8.7、8.5级地震中的同震变化现象[J].内陆地震,2006,20(4):336-341.
7张素欣,杨卫东,张子广.唐山矿井模拟与数字水位的记震能力对比分析[J].西北地震学报,2007,29(2):170-173.
8郑小菁,陈莹.福建数字地下流体网对远处大震映震能力分析[J].国际地震动态,2007,3:31-37.
9曾劲主编.控制工程基础[M].北京:电子工业出版社,2007.
10陆一心主编.现代工程控制理论[M].北京:化学工业出版社,2006.
11北京大学地球物理系,武汉测绘学院大地测量系,中国科学技术大学地球物理教研室编.重力与固体潮[M].北京:地震出版社,1982.
12 Thorne L and Terry C W.Modern global seismology[M].Academic Press,1981.
13曾融生.固体地球物理学[M].北京:科学出版社,1984.
14傅承义.地震波.中国大百科全书(固体地球科学卷)[M].北京:科学出版社,1985.
15 Menahem A and Singhs.Seismic waves and sources[M].New York:Haideberg Belin,Springer-Verlag,1981.
16傅承义,陈运泰,祁贵仲.地球物理学基础[M].北京:科学出版社,1985.
17郭伟国,李玉龙,索涛.应力波基础简明教程[M].西安:西北大学出版社,2007.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心