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井水位前驱波普遍性问题的探讨
张淑亮1,2, 吕芳1,2, 李斌1,2
1.山西省地震局,太原市晋祠路二段69号030002;2.太原大陆裂谷动力学国家野外科学观测研究站,太原市晋祠镇北I'1M-030025
摘要:
以山西、河北、内蒙等地5口映震能力较强的地下水位观测井为研究对象,对井水位前驱波普遍性问题进行了探讨。结果表明,强震井水位前驱波现象较为普遍,其比例可达65.1%(41/63);相同地震不同观测井前驱波特征各不相同,同一观测井在不同地震前的特征也各异,这可能与不同观测井具有不同的井-含水层结构以及不同地震前有着不同的震源参数有关;与单井水震波相比,震前有前驱波记录的次数略低于水震波,其比例在39.7%~50.7%之间;震前有前驱波记录的观测井占研究区观测井总数的比例可达66.7%。
关键词:  前驱波  地震  井水位  普遍性
DOI:
分类号:
基金项目:地震科学联合基金(A08051); 山西省科技攻关项目(2006031106、20090311084); 山西省自然科学基金(2011011027); 2011震情跟踪工作项目(2011011401)共同资助
Discussion about the general problems existing in the precursory wave of well water level
Zhang Shuliang1,2, Lv Fang1,2, Li Bin1,2
1.Earthquake Administration of Shanxi province,Taiyuan 030021,China;2.National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan 030025,China
Abstract:
Taking as the study objects for the five observation wells of underground water level with high earthquake reflecting ability in the provinces of Shanxi,Hebei and Inner Mongolia,the paper studies and discusses the generality of the precursory wave of well water level.It is indicated that the precursory wave happens commonly before strong earthquakes,with a ratio up to 65 percent(41/63).The characteristics of precursor waves of different observation wells are different.Even for the same observation well,the characteristics of precursory wave for different earchquakes are different too,which may be the result that different observation wells have different well-water-bearing bed structures and different earthquakes have different source parameters.Compared with the single well water shake waves,the recording time of precursory wave before strong earthquakes is slightly less than that of the water shake waves,with a ratio between 39.7 and 50.7 percent.The number of observation wells with precursory wave recordings before earthquakes accounts for up to 66.7 percent of the total of observation wells.Except for its characteristics,the precursory wave of well water level has its generality both in terms of the recording times and space.[著者文摘]
Key words:  Precursor wave  Earthquake  Well water level  Generality