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1.
Surfacedeformationandgravitychangescausedbydilatancyinalayeredelastic┐vis┐coelastichalfspaceYONGWANG(王勇)HOUTSEHSU(许厚泽)Instit...  相似文献   

2.
Fractal research of fault gouge   总被引:1,自引:0,他引:1  
FractalresearchoffaultgougeSHUN-MEISHAO(邵顺妹)andJIN-CHANGZOU(邹瑾敞)EarthquakeResearchInstituteofLanzhou,StateSeismologicalBurea...  相似文献   

3.
Seismicsourcerupturesofseveralstrongearthquakesof1989inSichuanregionofChinaYUANGAO1)(高原)ZHONG-LIANGWU2)(吴忠良)HUI-LANZHOU3)(周...  相似文献   

4.
ThemechanismofregionalgravitychangesbeforeandaftertheTangshanearthquakeRUI-HAOLI(李瑞浩)JIAN-LIANGHUANG(黄建梁)HUILI(李辉)DONG-SHENG...  相似文献   

5.
Effectsofmagnitudeaccuracyandcomplete┐nesdataonseismichazardparametersHUI-CHENGSHAO(邵辉成),JIA-SHUXIE(谢家树),PINGWANG(王平)andYA-X...  相似文献   

6.
Apreliminaryresearchestablishingthepresent-timeintraplateblocksmovementmodelontheChinesemainlandbasedonGPSdataSHUO-YUZHOU1)(周...  相似文献   

7.
LargescalecharacteristicdistancebetwenstrongearthquakeXIANFUDU(杜先富)SHAOXIEXU(许绍燮)InstituteofGeophysics,StateSeismologicalB...  相似文献   

8.
AnalysisonrupturefeatureofagreatcomplicatedearthquakeinKamchatkaYUANGAO1)(高原)SIHUAZHENG1)(郑斯华)HUILANZHOU2)(周蕙兰)ZHENLIU2)(...  相似文献   

9.
ResearchoncharacteristicsofmagnitudestructureofearthquakesequencesPEI-QINGSUN(孙佩卿)QIN-ZULI(李钦祖)YING-HUADAI(戴英华)JUNZHAO(赵军)Se...  相似文献   

10.
UppermantleflowbeneaththeNorthwestofChinaanditslithosphericdynamicsJIAN-HUAHUANGI(黄建华);XIA-HUACHANGI(常筱华)andRONG-SHANFUI傅容珊)(...  相似文献   

11.
INTRODUCTIONThe Zhangjiakou-Penglai fault zone has drawnextensive attentionfromseismologists and geologistssince it was determinedinthe1980’s(Zheng Binghua,et al.,1981).Ma Xingyuan,et al.(1989)consideredit asthe north boundaryof North China sub-block.Int…  相似文献   

12.
ResearchofpatterndynamicsparametersofcrustaldeformationfieldinseismogenicprocessShuo-YuZHOU(周硕愚),YunWU(吴云),Ruo-BoWANG(王若柏)and...  相似文献   

13.
    
By studying the seismicity pattern before 37 earthquakes withM⩾6.0 in North China and the pattern of crustal deformation in the Capital Area from 1954 to 1992, some abnormal characteristics of these patterns before strong earthquakes have been extracted. A comparison has been made between the anomalies of these two kinds of patterns. From the results we can know the following. (1) Before a strong earthquake, the seismicity will strengthen and the crustal deformation rate will increase. (2) Several years before a strong earthquake, there will be seismic gaps and deformation gaps around the epicenter of the quake. (3) The dynamic parameters of patterns all show a decrease in information dimension. This means that the crustal deformation has become more and more localized with time and it gives an important indication showing that a strong earthquake is in preparation. At the end of the paper, the physical mechanisms of the abnormal patterns of seismicity and crustal deformation have been explained in a unified way in terms of the earthquake-generating model of a inhomogeneous strongbody in inhomogeneous media.  相似文献   

14.
山西及邻区中强地震前断层形变特征及预报指标研究   总被引:1,自引:0,他引:1  
通过对山西地震带及邻区近年来发生的一系列中强地震前断层位移测量进行处理,综合研究了观测的映震能力,通过分析山西5年来5期GPS观测资料,对水平形变做出了解释,在此基础上,讨论了震前地震形变特征及应力场变化情况,获得了用形变预报中强地震的指标。  相似文献   

15.
By studying the seismicity pattern before 37 earthquakes withM?6.0 in North China and the pattern of crustal deformation in the Capital Area from 1954 to 1992, some abnormal characteristics of these patterns before strong earthquakes have been extracted. A comparison has been made between the anomalies of these two kinds of patterns. From the results we can know the following. (1) Before a strong earthquake, the seismicity will strengthen and the crustal deformation rate will increase. (2) Several years before a strong earthquake, there will be seismic gaps and deformation gaps around the epicenter of the quake. (3) The dynamic parameters of patterns all show a decrease in information dimension. This means that the crustal deformation has become more and more localized with time and it gives an important indication showing that a strong earthquake is in preparation. At the end of the paper, the physical mechanisms of the abnormal patterns of seismicity and crustal deformation have been explained in a unified way in terms of the earthquake-generating model of a inhomogeneous strongbody in inhomogeneous media.  相似文献   

16.
Researchontemporalandspatialdistribu┐tion,evolutionarycharacterandmechanismofcrustaldeformationfieldbeforeandaftertheTangshan...  相似文献   

17.
INT正ODU**!0厂Nln以la Is located In the nol’th segmentdthe North-southselsnuc Belt,Whlchls thejuncturedthe Qinghai-Xizang(Dbet)block,Alxa block and Odos block.In that region,the tectonic activity。svery strong;。y strong earthquakes occu。d In history,such as the 1739 ingluo M。8.0 earthqu拙eandl920 Halyuan M。8.5 eafthquake,etc.; Merately strongeaFthquakes are still veryactlve atpresent,onlyln the Wuzhong-un斟m area,there have been7 e血hquakes tvlth M。>5.0 to occ…  相似文献   

18.
张家口-渤海地震构造带的地壳形变研究   总被引:6,自引:1,他引:6       下载免费PDF全文
王若柏  顾国华  徐杰  周伟 《地震地质》2004,26(4):586-596
华北北部地区的张家口-渤海断裂带是控制现代强震的一条地震构造带。新近纪以来,在区域NEE向主压应力的作用下,新发育了一系列的NE向构造活动带,与张家口-渤海断裂带组成1组共轭的剪切破裂系统,控制了近代强震的发生。文中主要探讨了这条断裂带的地壳形变特征。长趋势GPS地壳形变图像反映了这条活动断裂带相对完整的左旋走滑活动。分期的地壳形变图像揭示了在中强地震前,沿该断裂带出现一系列的NE向梯度异常带,分别指示了唐山-河间、三河-涞水以及延怀-山西地震构造活动带的活动,表明了沿张家口-渤海断裂带出现了中强地震的中期前兆。研究认为,强震前地壳形变揭示的是深部蕴震层的应变活动信息,而强震之后比较杂乱的图像特征体现了盖层的调整运动  相似文献   

19.
应用文安地震200km范围内的定点形变观测资料,在研究断层活动性质的基础上,进一步综合分析在文安地震前后地壳形变的时空演化特征及其与地震活动的关系,结果表明:(1)部分测项在震前均出现张性或者压性转折变化,或者阶跃变化;(2)地表潮汐平面应变状态在中强地震前后表现出不同的变化特征;(3)平面应变参数曲线2011年前后发生同步转折变化,且变化幅度很大,但首都圈及附近地区并没有中强以上地震发生,可能与引发2011年3月日本9.0级特大地震的板块构造应力场变化有关。  相似文献   

20.
张祖胜  杨国华 《中国地震》1996,12(4):347-357
应用最新的全国垂直变形速率图和各地区不同年代的形变图。编绘相应的形变速率梯度图,计算了若干跨断层测量台、点资料的低通滤波残差及其一阶和二阶差分。结合在相应空间和时间域内所发 生的强震,讨论了地壳形变与强震的关系,得到了一些有意的结果。  相似文献   

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