共查询到20条相似文献,搜索用时 234 毫秒
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RediscussionontheseismicregimenetworkZe-GaoWANG(王泽皋);Pei-QingSUN(孙佩卿);Jing-ChunGAO(高景春);Shu-LianLI(李淑莲);XueZHANG(张雪)andYanGUO... 相似文献
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ComparisonandanalysisofthestressfieldinthesourceregionofTangshanandLancangearthquakesequencesGui-LingDIAO;(刁桂苓)Li-MinYU;(于利民)... 相似文献
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Analysisofforeshocksequenceofthe1975HaichengearthquakeofMs7.3Zhao-RongZUO(左兆荣);Jian-PingWU(吴建平)andZhi-LingWU(巫志玲)(Instituteof... 相似文献
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Onthehydro-spectrumofdeepwellsandtheresponseabilityofwell-aquifersystemWen-BinJIAN(简文彬);Bao-RenCHEN(陈葆仁)andShu-YunLIU(刘淑芸)(De... 相似文献
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ApplicationofPPclustermethodintheearthquakeswarmanalysisShi-YongZHOU;(周仕勇)Ling-RenZHU;(朱令人)andChuan-LingDENG(邓传玲)(Seismologic... 相似文献
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UppermantleflowbeneaththeNorthwestofChinaanditslithosphericdynamicsJIAN-HUAHUANGI(黄建华);XIA-HUACHANGI(常筱华)andRONG-SHANFUI傅容珊)(... 相似文献
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AstochasticmodeloftheFourierphaseofstron groundmotionZhen-PengLIAO;(廖振鹏)andXingJIN(金星)(InstituteofEngineeringMechanics,StateS... 相似文献
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PresentsituationoftheresearchandapplicationofengineeringmultiwaveseismicprospectinginChinaXIAO-PINGWU(吴小平),HONG-RUZHAO(赵鸿儒)(D... 相似文献
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ProcessofsourcedynamicsoftheJingtaiearthquake(M=6.2)Xue-BinDU(杜学彬);Zhi-DeYAN(闫志德)andMing-WuZOU(邹明武)(EarthquakeResearchInstitu... 相似文献
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Short┐termandimminentanomaliesofearth┐quakeofloadandunloadresponseratioofthewelleveltoearthtidesZHAO-DONGZHANG(张昭栋)1)XUE-ZHO... 相似文献
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地电阻率各向异性度的动态演化与汶川地震孕育过程 总被引:1,自引:1,他引:0
方炜 《地震地磁观测与研究》2009,30(6):21-26
汶川地震后,利用中国地震前兆观测台网的资料,对地震前后地电阻率各向异性度进行了分析。结果表明,汶川地震前,我国西部地区,特别是临近四川地区台站地电阻率各向异性度的变化较为明显。在震前5~6年内,西部地区部分台站地电阻率各向异性度开始出现准同步下降变化,震前2年内,这种下降变化有加速的迹象,并且下降幅度随着震中距离的减小而增大,汶川地震后,部分台站的异常形态开始恢复。经分析,我们认为这种变化可能与孕震区地下应力场调整有关。 相似文献
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Following a new train of thinking, this paper has explored first the potential information in the ground resistivity data observed by the existing geoelectric observation system, investigated and proposed a new dimensionless geoelectric precursor factor, the degree of ground resistivity anisotropy, S, and studied the characteristics of dynamic evolution pattern of S during the seismogenic process. The results show that, during the seismogenic process, the degree of ground resistivity anisotropy (S) displays a process of 'normal' →'abnormal strengthening (amplitude, range)' →abnormal weakening' → 'earthquake occurrence'→ 'normal'. The earthquake would occur at the time when the S value has entered the late stage of strengthening and turns to weaken and in the gradient belt on the margin of S anomaly region. The dynamic evolution pattern of S reflects the changes of the tectonic stress field during the seismogenic process. Therefore, it would be possible to trace the process of earthquake generation and occurrence from the dynamic evolution pattern of S so as to service earthquake prediction. 相似文献
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Anisotropy of the apparent resistivity variation rate near the epicentral region for strong earthquakes 总被引:1,自引:0,他引:1
IntroductionThe geo-electrical anisotropy before earthquake is of special significance for the prediction of earthquake location and for the research on crustal stress status near the epicentral region. The anisotropy has been studied from various aspects (CHEN, et al, 1983; QIAN, et al, 1985, 1996; LU, et al, 1990a; MAO, et al, 1995; RUAN, et al, 1999). But the anisotropic phenomena presented by geo-electrical data are not practically satisfactory and not clear as compared with the res… 相似文献
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通过研究唐山7.8级地震ρs震时突变现象。发现ρs震时突变具有变化幅度显著,空间分布普遍以及与震前ρs异常变化性质的相反的似弹性回跳现象等。研究了与ρs震时突变有关的震前ρs的前兆标志及其特征,用从复杂的ρs异常变化中识别和判定与地震有直接关系的地震前兆,对提高地电方法地震水平具有重要的实际意义和应用前景。 相似文献
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用归一化月速率方法处理了6次强震前近震中区11个台的地电阻率数据,得到在孕震中短期至短临阶段,与主压应力方向正交(或近于正交)测向的地电阻率下降变化的速率大于平行(或近于平行)主应力方向的变化速率.产生变化速率各向异性的原因可能是:在孕震后期的扩容阶段,裂隙走向沿主压应力方向优势排列,导电流体活动产生真电阻率变化速率的各向异性,表现为地表视电阻率变化速率的各向异性.本文为视电阻率各向异性的实验结果提供了震例支持,物理解释比较清晰,可能成为研究某些强震孕育晚期震源区及其附近地壳应力状态的参考依据. 相似文献
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绥化台地电阻率异常与震兆特征 总被引:1,自引:0,他引:1
以绥化地震台地电阻率8年的地震观测资料为参考依据,研究了台站周边300km范围内的5级以上地震和200km的4级以上地震,对地电阻率资料异常形态与地震关系进行了探讨。结果显示,其异常形态表现为多年趋势下降变化异常、年变的消失、震荡异常、台阶等,其正常年变形态为正弦波形的变化,异常与地震对应关系良好。 相似文献