震磁效应与地震预报相关性探索
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摘要
应用人工爆炸地震,农田抽水试验,地震地磁测量以及航磁△Ta资料反演成果,探索震磁关系。结果发现:(1)地磁场强度短周期变化数量不等;(2)实际观测的前兆磁异常比实验室测试的数据偏大。表明地震前兆异常不仅存在,而且这种地磁短周期变化是由多种物理效应叠加的结果。作者认为,在应力、应变等因素确定的条件下,温度的影响是构成震磁效应的重要因素,因此研究地壳磁性结构及磁性层底介面即居里等温面的空间分布特征,对潜在震源区的判定是有意义的。
Based on the explosion seismology,pumping test on farmland,seismomagnetic measurement and reversion results of ΔTa aeromagnetic data,the seismomagnetic correlation has been discussed in this paper.One of the results is that the short-period geomagnetic intensity varied differently;Another result is that the practical measured value of the precursor magnetic abnormal data is higher than in the laboratory.The results have showed that those earthquake precursor abnormalities indeed exist.And the magnetic short-period variation is the result of many physical effects superposition.The author considered that when the stress and strain are determined,temperature has been an important factor for causing seismomagnetic effect.Therefore,it is meaningful to do the research on the crust magnetic structure and the bottom interface of magnetosphere,which is the spatial distribution characteristics of curie isothermal surface.
Based on the explosion seismology,pumping test on farmland,seismomagnetic measurement and reversion results of ΔTa aeromagnetic data,the seismomagnetic correlation has been discussed in this paper.One of the results is that the short-period geomagnetic intensity varied differently;Another result is that the practical measured value of the precursor magnetic abnormal data is higher than in the laboratory.The results have showed that those earthquake precursor abnormalities indeed exist.And the magnetic short-period variation is the result of many physical effects superposition.The author considered that when the stress and strain are determined,temperature has been an important factor for causing seismomagnetic effect.Therefore,it is meaningful to do the research on the crust magnetic structure and the bottom interface of magnetosphere,which is the spatial distribution characteristics of curie isothermal surface.
引文
[1]赵连福.中国东北熊岳地区抽水试验及牡丹江人工爆炸地磁异常[J].国际地震动态,1983,5.
[2]祁贵仲.膨胀磁效应[J].地球物理学报,1978,21(1):18-33.
[3]郝锦奇,顾芷娟,周建国,等.磁铁矿岩的流变与磁化率各向异性[J].地球物理学报,1999,(42).
[4]赵连福,邓顺兴.两次中强以上地震地磁垂直分量的变化[J].东北地震研究,1986,2(4).
[5]郝锦奇,黄平章,周建国.岩石流变磁效应——震磁效应的一种可能机理[J].中国地震,1992,8(2):53-60.
[6]赵连福,牛雪,董宝中,等.海城地震区地壳磁结构特征研究[J].地震学报,1993,15(4).
[7]赵连福,胡跃峰,牛雪.东北地学断地壳磁结构与潜在震源区研究[G]//地震科学联合基金会资助课题成果汇编.北京:地震出版社,1992.
①卢造勋,夏怀宽,牛雪,等.内蒙古东乌珠穆沁旗至辽宁东沟地学断面,国际岩石圈计划项目,1992.
[2]祁贵仲.膨胀磁效应[J].地球物理学报,1978,21(1):18-33.
[3]郝锦奇,顾芷娟,周建国,等.磁铁矿岩的流变与磁化率各向异性[J].地球物理学报,1999,(42).
[4]赵连福,邓顺兴.两次中强以上地震地磁垂直分量的变化[J].东北地震研究,1986,2(4).
[5]郝锦奇,黄平章,周建国.岩石流变磁效应——震磁效应的一种可能机理[J].中国地震,1992,8(2):53-60.
[6]赵连福,牛雪,董宝中,等.海城地震区地壳磁结构特征研究[J].地震学报,1993,15(4).
[7]赵连福,胡跃峰,牛雪.东北地学断地壳磁结构与潜在震源区研究[G]//地震科学联合基金会资助课题成果汇编.北京:地震出版社,1992.
①卢造勋,夏怀宽,牛雪,等.内蒙古东乌珠穆沁旗至辽宁东沟地学断面,国际岩石圈计划项目,1992.
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