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Completeness analysis of the Historical Earthquake Catalogue in china

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Earthquake Research in china 1995年第4期9卷 4-8页

作者： Chen Yong and Chen QifuState seismological bureau,{2. 100036,chinacenter for analysis and prediction,SSB,{2. 100036,china

The historical earthquake catalogue of china has lasted more than 3000 years,and most of its data are inferred from historical *** earthquake catalogue in earlier times is not complete owing to various reasons,so some events are *** paper estimates the loss rate of earthquakes with various magnitudes in the historical earthquake catalogue for different time intervals quantitatively by using the Gutenberg-Richter formula and modern instrumental records,which will provide the references for statistic research in seismicity.

关键词： earthquake catalogue historical earthquake completeness

Research on the Spatial Inhomogeneity Paramter C_v of Earthquake Precursory Group

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Earthquake Research in china 2000年第1期14卷 6-18页

作者： Wang Xiaoqing , Chen Xuezhong , Li Zhixiong , and Jiao Minruocenter for analysis and {2., china seismological bureau, beijing 100036, china china seismological bureau, beijing 100036, china seismological bureau of Liaoning Province, Shenyang 110031, china

A research method and parameter C_v which depicts the spatial inhomogeneity of earthquakeprecursory group, are developed in the paper. The influences of factors, such asinhomogeneous distribution of precursory observatory stations, the variety of observing itemnumber at each observatory station and the anomaly number of the same observing item atdifferent stations, etc., which cause the non-earthquake induced inhomogeneity, can beeliminated from C_v. The criteria of C_v to recognize particular spatial pattern of earthquakeprecursory group are also introduced. Based on the method, the spatial inhomogeneity ofradon precursory group and its relation to moderately strong earthquakes occurred in Northchina during the same period are analyzed. The results show 5 strengthen processes of spatialinhomogeneity of radon precursory group before each of 5 earthquakes with M≥5. 0 in theregion during the period from Jan. 1, 1995 to Feb. 1, 1998. Among them 4 earthquakesoccurred within the time interval which the

关键词： Earthquake precursory group Spatial inhomogeneity Distribution pattern

Earthquake prediction Research in china

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Earthquake Research in china 2002年第3期16卷 271-274页

作者： Zhang Guomin, Li Li and Liu Jiecenter for analysis and {2., china seismological bureau, beijing 100036, china center for analysis and {2. China Seismological Bureau Beijing 100036 China

china is the country with the most earthquakes and the most serious hazards from continental earthquakes in the world. During the 1960s and 1970s, a series of strong earthquakes attacked the cities and counties in china causing great damage and many casualties. The most striking one was the Tangshan earthquake ( M S7 8) in July 1976, in which over 2.0,000 people died and a large industrial city was leveled. Public demand for earthquake forecasting surged after this disaster. From the mid-1960s, systemic research on earthquake forecasting has evolved throughout the country. In this paper the main advances in earthquake {2. research in china have been summarized.

关键词： Earthquake prediction Earthquake monitoring Earthquake case

Group Strong Earthquakes and Triggering by Tidal Stress

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Earthquake Research in china 2001年第4期15卷 354-364页

作者： Zhang Guomin, Li Li, Li Kaiwu, and Ma Hongshengcenter for analysis and {2., china seismological bureau, beijing 100036, china center for analysis and {2. China Seismological Bureau Beijing 100036 China

The results obtained using the group model of earthquakes generated in tectonic blocks are further used in this paper to analyze the relationship between the M S≥7.0 events in Chinese mainland and the modulation and triggering from the earth tides. The research shows that the M S 7.0 events in Chinese mainland have been significantly triggered by the tidal stress, especially within the active period with group strong earthquakes. In the quiescence period of strong earthquakes, no M S7.0 events were triggered, while within the active period, over 82.4% of strong earthquakes took place within a special moon phase, which is 36.4% higher than the average. Therefore, the modulation and triggering of tidal stress can be used to distinguish the active periods and to forecast the time of the strong earthquakes within the active period. The relationship between the tidal triggering and the tectonic dynamic condition is investigated and the mechanism of the modulation is simulated with the group model of earthquakes generated in tectonic blocks.

关键词： Group earthquakes Tidal triggering Modulation

邢台地震区地壳速度结构特征与强震孕育发生的关系

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地球物理学报 1999年第5期42卷 629-639页

作者： YIN JING-YUAN MEI SHI-RONG XUE YAN(center for analysis and {2., CSB. beijing 100036, china) 国家地震局分析预报中心北京 100036

运用三维有限单元法，探索地壳结构的非均匀性对地壳应力场的影响．假定分层地壳结构中镶嵌高速块体，低速块体，高、低速块体３种情况，分别计算壳内平均应力与水平剪应力的变化图像．结果表明：高速块体单独存在可导致高应力在高速体... 详细信息

运用三维有限单元法，探索地壳结构的非均匀性对地壳应力场的影响．假定分层地壳结构中镶嵌高速块体，低速块体，高、低速块体３种情况，分别计算壳内平均应力与水平剪应力的变化图像．结果表明：高速块体单独存在可导致高应力在高速体内的局部集中，并在其边缘和四个角区形成应力的高度集中，有利于强震的孕育和发生；低速体单独存在时，由于低速体本身不能积累应力，而其上部的应力集中程度不大，难以形成强震；高、低速体的同时存在则有利于高应力在高速体内的高度集中和在高速体外的地壳上、下部的相对集中，形成对大地震孕育、发生更加有利的条件．本文结果与邢台地震序列的空间分布图像吻合甚好．

关键词：高速体低速体扰动应力地震区地壳应力孕震

A STUDY ON RELATION BETWEEN CONTINUOUS RAPID DEFORMATION AND EARTHQUAKLES

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大地测量与地球动力学 2003年第B12期23卷 79-82页

作者： Niu Anfu, Zhang Jing, Gao Fuwang, Ji Ping and Yan Xudong (center for analysis and {2., CEA, beijing 100036, china) center for analysis and {2. CEA Beijing 100036 China

Continuous Rapid Deformation (CRD) may be an important precursor before some strong earthquakes with magnitude greater than \%M\%s5.0. This paper shows some characteristics of CRD, and proposes a method for identifying precursory CRD that is closely related to the process of earthquake preparation. From the deformation data in Yunnan Sichan provinces, we obtained the tilt and strain thresholds of 4.5ms/d and 5 ×10 -7 /d, respectively. Compared the tilt CRD in this region before 9 earthquakes (short term fore shocks and after shocks not included) with magnitude greater than 5.8 in the period from January of 1990 to May of 2.01, we found that 8 earthquakes occurred within 5 months after the CRD with a duration of more than 2. days and a tilt velocity of more than 4.5ms/d without false prediction, but with one failure in earthquake prediction. For the strain CRD, 5 earthquakes occurred after the CRD; there was no false prediction, but 4 earthquakes unpredicted. We have tried to increase the thresholds, but found either the failure ratio or the rate of false prediction increased, while the success rate not obvious increased.

关键词：连续急速变形 CKD 地震预报变形与地震的关系 K型斜坡地壳形变

Lithosphere types in North china:Evidence from geology and geophysics

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Science china Earth Sciences 2005年第11期48卷 1809-1827页

作者： QIU Ruizhao1,2. DENG Jinfu3, ZHOU Su3, LI Jinfa4, XIAO Qinghui1,5, WU Zongxu6 & LIU Cui3 1. Institute of Geology, Chinese Academy of Geological Sciences, beijing 100037, china 2. Development and Research {2., china Geological Survey, beijing 100037, china 3. china University of Geosciences, beijing 100083, china 4. china University of Geosciences, Wuhan 430074, china 5. Information {2. of Ministry of Land and Resources, beijing 100812. china 6. Institute of Geology, State seismological bureau, beijing 10002., china Institute of Geology Chinese Academy of Geological Sciences Beijing China Development and Research center China Geological Survey Beijing China china University of Geosciences Beijing China china University of Geosciences Wuhan China Information center of Ministry of Land and Resources Beijing China Institute of Geology State Seismological Bureau Beijing China

On the basis of the characteristics of geology and geophysics in North china, three types of lithosphere, namely, the cratonic, the orogenic and the rift lithospheres can be classified. In terms of petrological method (based on the information from Precambrian rock assemblages, igneous activities, deep-seated enclaves, etc.) and the relationship between seismic velocity and rock compositions, the crust-mantle petrological and chemical structure models can be set up. Researching results indicate that the geology and geophysics of North china platform bears the similar characteristics in comparison with those of the global typical cratons. The Eerduosi(Ordos) block located in the west of the North china Platform is a remnant of cratonic lithosphere after the North china platform had undergone “activation” in Mesozoic and “reconstruction” in Cenozoic times. The continental crust consists mainly of TTG rock assemblage while the subcontinental lithosphere mantle mainly consists of strongly depleted harzburgite. The craton was finally formed in late Archaean and early Proterozoic, and has been kept in stability up to present; its crustal-mantle petrological structures of lithosphere can be set up as a reference for the study of North china craton and even Sino-Korean craton. In the Mesozoic period, the middle and east areas of North china platform were activated in the Yanshanian orogenic process, the continental crust was reformed by material and heat-transfer of convective mantle and the original crustal TTG component was reconstructed to be granitic crust, and the subcontinental lithosphere man- tle was replaced by the Yanshanian harzburgite-lherzolite. The Yanshan-Taihang Mountains were the remnants of orogenic lithosphere after the rifting in eastern North china in Cenozoic. The present thickness of continental crust and lithosphere in the Yanshan-Taihang Mountains is not equal to their thickness during the Yanshanian orogenic movement because they had undergone the

关键词： lithospheric types,evidence of geology and geophysics,crust-mantle petrological structure,deep process

Internalization and distribution of three α1-adrenoceptor subtypes in HEK2.3A cells before and after agonist stimulation

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Acta Pharmacologica Sinica 2007年第3期28卷 359-366页

作者： Shu-yi WANG~2.Yao SONG~2.Ming XU~2.Qi-hua HE~3 Qi-de HAN~2.You-yi ZHANG~(2.4)2.Institute of Vascular Medicine,Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,beijing 100083,china 2.{2. of Medical analysis,Peking University,Health Science {2.,beijing 100083,china Institute of Vascular Medicine Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences Ministry of Education Beijing China center of Medical analysis Peking University Health Science Center Beijing China

Aim:To examine the subcellular distribution of the 3 α1-adrenoceptor（α1-AR）subtypes and their internalization and trafficking upon agonist stimulation in hu-man embryonic kidney 2.3A ***:Confocal real-time imaging,enzymelinked immunosorbent assay（ELISA）and whole cell[3H]-prazosin binding assaywere applied to detect the distribution and localization of the 3 α1B-AR ***:α1A-AR was found both on the cell surface and in the cytoplasm;α1B-AR,however,was predominantly detected on the cell surface,while α1D-AR wasdetected mainly in the intracellular *** stimulation withphenylephrine,localization changes were detected by confocal microscopy forα1A-and α1B-AR, but the localization of α1D-AR were *** promoted a more rapid internalization of α1B-AR than α1A-AR.α1D-ARinternalization was detected only by *** cell[3H]-prazosin bindingassay showed that α1A-AR functional receptors were detected both on the cellsurface and in the cytoplasm;α1B-AR,however,were detected predominantly onthe cell surface,while α1D-AR were detected mainly in intracellular *** stimulation promoted internalization of α1A-and α***:Phenylephrine stimulation induced changes in the localization of the3α1-AR.

关键词： adrenoceptor agonist stimulation confocal image enzyme-linked immunosorbent assay [~3H]-prazosin binding assay internalization subcellular distribution subtype

On Shear-wave Splitting in Tangshan Region

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Earthquake Research in china 1995年第2期9卷 3-11页

作者： Sun Yong and Zheng Sihuaseismological bureau of Liaoning Province,Shenyang 110031,{2. center for analysis and prediction,SSB,beijing 100036,{2.

Shear-wave splitting in Tangshan region is studied by using digital seismic *** 3-component digital seismic data in Tangshan strong ground motion array,it is found that almost all earthquakes occurred during 1982.to 1984 have significant shear-wave *** polarization directions of faster shear waves in 7 stations are near EW,which are consistent with the axis of maximum principal compressive stress obtained from earthquake fault mechanisms and geodetic *** crack densities of the 7 stations are roughly estimated,0.019 for TS01,TS02.and TS15,0.015 for TS03,TS07 and TS18 and 0.02. for TS19,by using the average time delay of slow shear-wave at the 7 stations.

关键词： S-wave fission Tangshan china