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《Earthquake》 1993-02
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FEATURES OF GRAVITY VARIATIONS BEFORE STRONG EARTHQUAKES

Feng Xiao Ding Liqing(Seismological Bureau of Guangdong. Province)  
Before earthquake occurrence, the crustal deformation causes redistribution of the earth density, so there occur some characteristic changes in the earth gravity field. This paper harmonically analyzed Guangzhou gravity data before and after both Philipine M 8 and Taiwan M 6.1 earthquakes in July 1990 and processed the high and low frequency filtrering, and also examined the reliability of the extracted gravity precursor. Results show that before strong earthquakes, the gravity variation in Guangzhou region displays waveform distorsion. of O1 main-wave tidal- factor, the magnitude fall down to the lowest value, then the earthquake occurred while the value rose. Three days before earthquakes the nontidal gravity variation began having obvious high-frequency pulse anomaly information, authors here consider that this is a reliable short-impending earthquake precursor with clear physical meaning.
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【References】
Chinese Journal Full-text Database 2 Hits
1 Zhao Fuyuan and Zhang Guodong(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China);Micro-Fracture Wave Before an Earthquake[J];Recent Developments in World Seismology;2009-06
2 ZHAO Fuyuan,ZHANG Guodong and WANG Zezhi (National Astronomical Observatories,The Chinese Academy of Sciences,Beijing 100012,China);Micro Fracture Elastic Rebound Model and Three Waves of a Tectonic Earthquake[J];South China Journal of Seismology;2009-04
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 YAO Yu-chun1,2,YAO Ling-kan2,YUAN Bi-yu31.The Second Railway Survey & Design Institute,Chengdu 610031,China;2.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;3.University of Chengdu Information Technology,Chengdu 610103,China;Self-organization characteristics of a cut slope and its disaster prevention[J];Journal of Chengdu University of Technology(Science & Technology Edition);2007-01
2 Li Wenying Seismological Bureau of Hebei province;AN INFORMATION METHOD FOR SYNTHETIC PREDICTION OF EARTHQUAKE[J];Seismological Research of Northeast China;1990-03
3 Cui Chaoying; Wang Weichen ( Seismological office of Shenvang city );DISCUSSION ON MAKING POLICY OF THE WAY TO RELEASE IMPENDING EARTHQUAKE PREDICTION IN SHENYANG CITY[J];Seismological Research of Northeast China;1991-03
4 Wang Haitao Zhu Lingren Yang Maling Cai Zhongqiong Bai Chaoying(Seismological Bureau of Xinjiang Uygur Autonomous Region);ANALYSIS OF INFORMATION ENTROPY OF SEISMICALLY PRECURSORY OBSERVATION DATA——TAKING THE GROUNDWATER RADON IN URUMUQI No. 10 WELL FOR AN EXAMPLE[J];Earthquake;1991-05
5 Bai Chaoying Zhu Lingren Wang Haitao Zhou Shiyong(Seismologtcal Bureau of Xiajiang Uygur Autonomous Region);SIGNIFICANCE OF SEISMICALLY ACTIVE INFORMATION ENTROPY AND TIME-SPACE FRACTIONAL DIMENSION IN EARTHQUAKE PREDICTION[J];Earthquake;1992-04
6 Lu Liangyu Xu Xintong Ma Binggui(Seismological Bureau of Liaoning Province);LAYER COMPOSITION OF SINGLE STATION AND MULTICHANNEL INFORMATION[J];Earthquake;1993-03
7 Li Wenying Hu Xinliang Zhang Qingrong Ping Jianjun(Seismological Bureau of Hebei Province);APPLICATION OF INFORMATION SYNTHESIS INTEGRATION METHOD IN SHORT-TERM EARTHQUAKE PREDICTION[J];Earthquake;1993-06
8 Cheng Wanzheng (Seismological Bureau of Sichuan Province);RESEARCH ON THE COMPREHENSIVE PREDICTION METHOD AND THE CRITERION OF SHORT-TERM AND IMMINENT MICRO-PRECURSOR IN SICHUAN REGION[J];Earthquake;1994-S1
9 Liu Xiqiang Lin Huaicun(Seismological Bureau of Shandong Province);APPLICATION OF A STATISTICAL MODEL TO EARTHQUAKE PREDICTION[J];Earthquake;1995-02
10 Jiao Mingruo Liu Baoheng (Seismological Bureau of Liaoning Province, Shenyang 110031, China);APPLICATION OF FRACTAL DIMENTION THEORY TO THE WATER RADON ANALYSIS[J];Earthquake;1996-02
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 LI Jun-zhi XIA Ya-qin CHEN Wei-sheng (Research Institute of Earthquake Prediction,Beijing University of Technology,Beijing 100022,China);According as Precursory Information Prediction of Strong Earthquakes in Taiwan[J];Journal of Beijing University of Technology;2007-09
2 Hao Xiaoguang 1) ,Xu Houze 1) ,Hao Xinghua 1) ,Lu Chuncao 1) and Hu Hongqiao 2) 1.Institute of Geodesy and Geophysics, CAS,Wuhan 430077 2. Polar Research Institute of China, Shanghai 200129;GRAVITY HIGH FREQUENCY DISTURBANCE AND OCCURRENCE OF EARTHQUAKE[J];Crustal Deformation and Earthquake;2001-03
3 Li Dongmei\+\{1)\},Bai Xiaoqin\+\{2)\},Shi Xingjue\+\{1)\} and Feng Jianqin\+\{2)\}\;1) Department of Earth and Space Science,University of Science and Technology of China,Hefei\ 230026 2)Seismological Bureau of Shanxi Province,Taiyuan\ 030002;ANALYSIS OF PRECURSOR WAVE CHARACTERS RECORDED AT HOUMA STATION,SHANXI PROVINCE[J];Crustal Deformation and Earthquake;2002-03
4 Hao Xiaoguang,Hu Xiaogang,Xu Houze,Zhong Min,Fang JianHao Xinghua,Liu Min,Liu Genyou and Xue Huaiping(Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077);GRAVITY DISTURBANCE BEFORE WENCHUAN Ms8.0 EARTHQUAKE[J];Journal of Geodesy and Geodynamics;2008-03
5 Wang Shuangxu Jiang Zaisen Zhang Xi Chen Wensheng (Second Crustal Deformation Monitoring Center, China Seismological Bureau, Xi′an 710054, China);CURRENT TECTONIC DEFORMATION AND SEISMO GENIC CHARACTERISTICS ALONG THE NORTHEAST MARGIN OF QINGHAI-XIZANG BLOCK[J];Acta Seismologica Sinica;2002-01
6 Zhang Guodong Han Yanben Zhao Fuyuan (National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China);EARTHQUAKE PREMONITIONS DETECTED BY ASTRONOMICAL OBSERVATIONS[J];Acta Seismologica Sinica;2002-01
7 Lin Yizai (Seismological Office of Changle City, Fujian Province, Chengle, 350200);Anomaly Characteristics of Soil Radon and Nantou Earthquake M7.6 in Taiwan[J];Journal of Seismological Research;2001-04
8 Zhang Yanbin 1 Jiang Jun 1 Li Shengle 2 Cheng Jing 3 He Shengqi 3 (1.Department of Physics, Huazhong University of Science and Technology 430074, China) (2.Institute of Seismology,CEA, Wuhan 430071, China) (3.Earthquake Administration of Yunnan Province, Kunming 650041, China);Strong Earthquakes and Precursory Characteristics of Ground Deformation Anomaly in West Yunnan Province[J];Journal of Seismological Research;2004-02
9 Zhao Fuyuan,Zhang Guodong and Han Yanben(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China);A Density—Tectonic Stress Wave with Ultra-Low Frequency Before Earthquakes[J];Recent Developments in World Seismology;2007-12
10 Zhao Fuyuan(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China);More Evidence for the Existence of A Density—Tectonic Stress Wave with Ultra-Low Frequency Before Earthquakes[J];Recent Developments in World Seismology;2008-12
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 ZHAO Fuyuan,ZHANG Guodong and WANG Zezhi (National Astronomical Observatories,The Chinese Academy of Sciences,Beijing 100012,China);Micro Fracture Elastic Rebound Model and Three Waves of a Tectonic Earthquake[J];South China Journal of Seismology;2009-04
China Proceedings of conference Full-text Database 1 Hits
1 Zhao Fuyuan;Micro Fracture Elastic Rebounding Model—ARoute Map of A Tectonic Earthquake[A];[C];2009
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