江苏地电台站渗流方位角和极化方位角差异特征分析研究
|
摘要
利用江苏地电台站的地电场和地磁数据,计算各个台站的极化方位角和渗流方位角,其中,渗流方位角分别采用谐波振幅和峰谷值2种方法进行计算,并对计算结果进行分析。结果表明:(1)新沂台和南京台由于台站覆盖层较浅,极化方位角存在线性极化和较多的非线性极化现象;而高邮台和海安台由于覆盖层较厚,极化方位角多数存在非线性极化现象。(2)用峰谷值法与用谐波振幅法计算所得的渗流方位角,两者相差不大,与理想模型间的差距也较小;而极化方位角与模型差距较大。因此,用渗流方位角尝试进行地震映震关系研究是基本可靠的。(3)高邮台的渗流方位角与高邮-宝应M_S4.9地震间具有较好的对应关系。
The geoelectric field and geomagnetic data of the Jiangsu seismic stations is used to calculate the polarization and seepage azimuth angle of each station in this paper. The azimuth angle is calculated by two methods:harmonic amplitude and peak and valley value. The results are compared and used to carry out the relationship analysis with earthquakes. The result shows that:(1) there is linear polarization and much nonlinear polarization phenomena in the polarization azimuth of the Xinyi seismic station and Nanjing seismic station because of the shallow cover layer of the stations,while the polarization angle of the Gaoyou and Hai'an stations are mostly nonlinear polarization phenomena,because of the thickness cover layer.( 2) The difference of the seepage azimuth angle between the peak and valley method,and the harmonic amplitude method is small.The gap of the seepage azimuth angle between the ideal models is smaller than the polarization azimuth angle. Therefore,it is basically reliable to try to use the seepage azimuth to attempt the relationship with earthquakes.( 3) The seepage azimuth of the Gaoyou seismic station has a good correspondence with the Gaoyou-Baoying M_S4.9 earthquake.
The geoelectric field and geomagnetic data of the Jiangsu seismic stations is used to calculate the polarization and seepage azimuth angle of each station in this paper. The azimuth angle is calculated by two methods:harmonic amplitude and peak and valley value. The results are compared and used to carry out the relationship analysis with earthquakes. The result shows that:(1) there is linear polarization and much nonlinear polarization phenomena in the polarization azimuth of the Xinyi seismic station and Nanjing seismic station because of the shallow cover layer of the stations,while the polarization angle of the Gaoyou and Hai'an stations are mostly nonlinear polarization phenomena,because of the thickness cover layer.( 2) The difference of the seepage azimuth angle between the peak and valley method,and the harmonic amplitude method is small.The gap of the seepage azimuth angle between the ideal models is smaller than the polarization azimuth angle. Therefore,it is basically reliable to try to use the seepage azimuth to attempt the relationship with earthquakes.( 3) The seepage azimuth of the Gaoyou seismic station has a good correspondence with the Gaoyou-Baoying M_S4.9 earthquake.
引文
崔腾发、杜学彬、叶青等,2013,中国大陆经纬链地电场日变化,地球物理学报,56(7),2358~2368.
陈强,2009,高邮凹陷西部地区构造应力场及对构造的控制作用研究,硕士学位论文,青岛: 中国石油大学(华东).
国家地震局科技监测司,1995,地震电磁观测技术,39~41,北京:地震出版社.
洪德全、王行舟、倪红玉等,2013,多种方法研究2012年7月20日江苏高邮MS4.9地震震源机制解和震源深度,地球物理学进展,28(4),1757~1765.
黄清华、刘涛,2006,新岛台地电场的潮汐响应与地震,地球物理学报,49(6),1745~1754.
江苏省地震局,2008,江苏省地震监测志,22~149,南京:河海大学出版社.
康清清、缪发军、刘红桂等,2015,利用矩张量反演法研究江苏高邮-宝应MS4.9地震震源机制解和震源深度,地球物理学报,58(1),204~215.
马钦忠、李伟、张继红等,2014,与大电流信号有关的华北东部地区地电场空间变化特征的研究,地球物理学报,57(2),518~530.
毛桐恩、席继楼、王燕琼等,1999,地震过程中的大地电场变化特征,地球物理学报,42(4),520~528.
阮爱国、赵和云,2000,提取地震地电场异常的垂直极化方向投影法,地震学报,22(2),171~175.
施炜、张岳桥、董树文,2003,郯庐断裂带中段第四纪活动及其分段特征,地球学报,24(1),11~18.
孙业君、黄耘、江昊琳等,2015,茅山断裂带及邻区地震震源机制解计算及应力场反演,中国地震,31(4),605~615.
谭大诚,王兰炜,赵家骝等,2011,潮汐地电场谐波及各向波形影响要素,地球物理学报,54(7),1842~1853.
谭大诚、席继楼、张慧等,2013,地电场水文地质因素及裂隙水主体渗流方向逐日计算,地震学报,35(1),36~49.
谭大诚、赵家骝、席继楼等,2010,潮汐地电场特征及机理研究,地球物理学报,53(3),544~555.
万永革,2011,中国现代构造应力场,世界地震译丛,(3),18~29.
汪素云、高阿甲、许忠淮,1993,中国及邻区地震震源机制特征,见:国家地震局震害防御司,中国地震区划文集,10~26,北京:地震出版社.
王章青、李华东、杜二鹏,2012,苏北盆地海安凹陷现今构造应力场特征及构造样式,地质力学学报,18(1),22~31.
许忠淮、徐国庆、吴少武,1999,东海地区现代构造应力场及其成因探讨,地震学报,21(5),495~501.
张绍治、吴少武、刘仲方,1989,江苏地区现代构造应力场特征,江苏地质,(2),3~9.
张学民、翟彦忠、郭学增等,2007,远震前的地电场潮汐波异常,地震学报,29(1),48~58.
赵和云、阮爱国、扬荣等,2002,天祝大地电场异常与1995年永登5.8、1996年天祝5.4级地震,西北地震学报,24(1),56~64.
陈强,2009,高邮凹陷西部地区构造应力场及对构造的控制作用研究,硕士学位论文,青岛: 中国石油大学(华东).
国家地震局科技监测司,1995,地震电磁观测技术,39~41,北京:地震出版社.
洪德全、王行舟、倪红玉等,2013,多种方法研究2012年7月20日江苏高邮MS4.9地震震源机制解和震源深度,地球物理学进展,28(4),1757~1765.
黄清华、刘涛,2006,新岛台地电场的潮汐响应与地震,地球物理学报,49(6),1745~1754.
江苏省地震局,2008,江苏省地震监测志,22~149,南京:河海大学出版社.
康清清、缪发军、刘红桂等,2015,利用矩张量反演法研究江苏高邮-宝应MS4.9地震震源机制解和震源深度,地球物理学报,58(1),204~215.
马钦忠、李伟、张继红等,2014,与大电流信号有关的华北东部地区地电场空间变化特征的研究,地球物理学报,57(2),518~530.
毛桐恩、席继楼、王燕琼等,1999,地震过程中的大地电场变化特征,地球物理学报,42(4),520~528.
阮爱国、赵和云,2000,提取地震地电场异常的垂直极化方向投影法,地震学报,22(2),171~175.
施炜、张岳桥、董树文,2003,郯庐断裂带中段第四纪活动及其分段特征,地球学报,24(1),11~18.
孙业君、黄耘、江昊琳等,2015,茅山断裂带及邻区地震震源机制解计算及应力场反演,中国地震,31(4),605~615.
谭大诚,王兰炜,赵家骝等,2011,潮汐地电场谐波及各向波形影响要素,地球物理学报,54(7),1842~1853.
谭大诚、席继楼、张慧等,2013,地电场水文地质因素及裂隙水主体渗流方向逐日计算,地震学报,35(1),36~49.
谭大诚、赵家骝、席继楼等,2010,潮汐地电场特征及机理研究,地球物理学报,53(3),544~555.
万永革,2011,中国现代构造应力场,世界地震译丛,(3),18~29.
汪素云、高阿甲、许忠淮,1993,中国及邻区地震震源机制特征,见:国家地震局震害防御司,中国地震区划文集,10~26,北京:地震出版社.
王章青、李华东、杜二鹏,2012,苏北盆地海安凹陷现今构造应力场特征及构造样式,地质力学学报,18(1),22~31.
许忠淮、徐国庆、吴少武,1999,东海地区现代构造应力场及其成因探讨,地震学报,21(5),495~501.
张绍治、吴少武、刘仲方,1989,江苏地区现代构造应力场特征,江苏地质,(2),3~9.
张学民、翟彦忠、郭学增等,2007,远震前的地电场潮汐波异常,地震学报,29(1),48~58.
赵和云、阮爱国、扬荣等,2002,天祝大地电场异常与1995年永登5.8、1996年天祝5.4级地震,西北地震学报,24(1),56~64.