兴1井水位的映震特征     

张文阁  迟恭财等 《地震》1995,(2):157-160

兴1井是辽宁省内最早建成的静水位观测井，已有近20年的观测历史。系统分析预测以来的资料，发现该井水位有很强的映震能力并有一定的映震规律，可进行单井水位异常预报地震震级与发震时间的科学试验。  相似文献   

利用中期地震活动异常综合预测地震危险区     

李文英  张清荣  平建军 《华北地震科学》1995,(1)

在分析了首都圈地区（３８．５°～４１°Ｎ，１１３°～１２０°Ｅ）中强以上地震前地震活动特征的基础上，总结出了本区中强以上地震前地震活动的普遍性特征，应用孕震模型对地震活动异常进行综合分析，给出了应用地震活动异常进行地震预报的物理基础。文中还提出了应用中期地震活动异常进行预报的综合判别指标，当其达到给定阈值时，再考虑地质构造、中强以上地震发生的自然概率、大震后的减震作用、中期地震活动异常的分布及其预报效能等因素，给出二维的综合概率分布图，把概率值较高的地区作为未来一、二年中强以上地震的危险区。此外还进行了震级、时间预测方面的研究。  相似文献   

新疆钻孔应变异常特征及其与地震三要素关系研究     

蒋靖祥  许风柱  闫均科 《内陆地震》1995,(2)

将新疆高精度钻孔应变仪１０年来观测到的应变异常划分为趋势异常、短期异常、临震异常三类，并对这三种异常的特征进行了分析总结．认为，地震三要素与应变异常参量关系密切，震级与异常量级、震中距有着确定性关系。  相似文献   

新疆天山地区地下流体地震前兆研究的现状与发展前景   总被引：6，自引：8，他引：6  

王道 《内陆地震》1995,9(2):137-149

系统地介绍了新疆天山重点震监视区下流体观测网，及其地质构造环境和地下水的成因类型，总结了２０年来地下流体地震前兆探索与地震前兆探索与地震预报研究的基本经验和成果。  相似文献   

地下流体前兆模糊识别     

许秋龙 《内陆地震》1995,9(3):286-290

在地震的孕育、发生到发展的过程中，可能会出现多项地下流体观测量不同程度的前兆异常变化，这些异常变化是复杂多样、模糊不清的。引入模糊识别法对一定区域和一定时间段的地下流体观测数据进行了分析和处理，表明模糊识别法可较好地识别和分辨出地下流体前兆的地震异常。  相似文献   

A Computer Model for Cyclic Activity of Strong Earthquakes in Continental Seismic Zones     

Zhang Guomin  Geng Lumin  and Shi YaolinCenter for Analysis  Prediction  Beijing  China  'Graduate School  Academia Sinica  Beijing  China 《中国地震研究》1995,(1)

Based on the study of activity of earthquakes with M**********>7.0 in mainland China,we have found a dynamic pattern,i.e.,the cyclic characteristics in time and migration from one seismic zone to another in space.In order to understand the physical mechanism of this pattern,we use a nonlinear dynamic model to simulate the seismic activity in fault zones under a unified tectonic stress field.The basic elements in our model consist of a Maxwell body and a rigid sliding block.Basic elements in a column represent a fault,and coupling elements connecting different columns simulate the interaction among faults and fault segments.The results provide insights to the cyclic activity of strong earthquakes and to the feature of mutual influence between strong earthquakes in groups in the climax of seismic activity.  相似文献   

A Study on the Relationship Between Sequential Anomalies of Water Level Step-Variations in the Wanquan Well and Earthquakes     

Cao XinlaiSeismological Bureau of Hebei Province  Shijiazhuang  China 《中国地震研究》1995,(1)

This paper studies the relationship between water level step-variation anomalies and regional seismic activity.The train of thinking is as follows:First,a series of water level step-variation anomalies are regarded as sequential step-variation anomalies; next,these sequential anomalies are divided into several sub-sequential anomalies according to the temporal density of step-variations in different segments of the sequence; then the generation and evolution processes of various sub-sequential anomalies are analyzed to find their relation with regional moderate-strong earthquake activities,and finally the various sub-sequential anomalies are synthesized as sequential anomalies so as to analyze their relation with the tendency of seismic activities.By the above method,this paper has analyzed the relationship between a series of water level step-variation anomalies at the Wanquan well since 1981 and several regional moderate-strong earthquake activities.According to the monthly frequency,amplitude and tre  相似文献   

Gravity and magnetic expression of the concealed basic and ultrabasic bodies in Chalkidhiki,Northern Greece     

Gregory N. Tsokas 《Pure and Applied Geophysics》1995,144(1):117-134

The anomalies which are shown on the gravity and aeromagnetic data of the Chalkidhiki peninsula of Northern Greece reveal the presence of three concealed dense and magnetized bodies. The ophiolitic belt which continues northwards of the geophysical anomalies suggests that they are caused by structures which belong to it. Multiple source Werner deconvolution shows that the lower surfaces of buried bodies in Toroneos Gulf and the one onshore are concave upwards. The northern concealed body has a width of 16 kilometers, while the southern one is 8 kilometres in width. A three-dimensional model, well constrained, gives an estimate of the dimensions of the onshore feature. The edges of the bodies, delineated by the terracing method, are formed by faults along the trend of the Hellenides orogenic belt. The edges of the body in the outer part of Toroneos Gulf may be associated with seismic swarms that occurred in the 1980s.  相似文献   

伊通地堑上地幔剪切带   总被引：3，自引：1，他引：3  

张小鸥 《地震地质》1995,17(2):167

通过研究糜棱岩型幔源包体的变形显微构造、位错亚构造及组构特征，确定它是上地幔剪切带的代表物质。该带形成温度为７２９～８２８℃、压力为１．１０～１．３８ＧＰａ、差异应力为９７～１５０ＭＰａ、应变速率为ＩＯ￣（－１４）～１Ｏ￣（－１２）ｓ￣（－１）、等效粘滞度为１０～１０００ＥＰａ·ｓ和深度为３７～４５ｋｍ。这是一种与地幔底辟作用有关的规模较小的缓倾斜剪切带，也是应变集中带，能导致上地幔地震波速各向异性，并与地震活动有关  相似文献   

1987年1月8日甘肃迭部5.9级地震与地形变特征   总被引：1，自引：0，他引：1  

邹明吾  潘颖凌 《地震地磁观测与研究》1995,16(3):35-40

根据１９８７年１月８日甘肃迭部５．９级地震前，该区域的地壳形变中长期背景和定点台站连续观测资料的震反应异常，分析研究了这此异常的变化特征。  相似文献