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《North China Earthquake Sciences》 1985-S1
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THE RAPID VARIATION OF LOCAL STRESS FIELD PRIOR TO EARTHQUAKE BEING INVERSED BY THE OBSERVATION DATA OF SPOUTING-TYPE UNDER-GROUND WATER ABNORMALY

Wang Liuqiao Li Shanyin (The Seismological Bureau of Xinjiang Autoaomous Region)  
After many investigations of the spouting abnormalies of underground water prior to earthquakes, "a two-dimensional radial symmetrical unstable infiltration flow model in single water layer under the action of pulse tectonic force" has been put forward as the precursor mechanism oi this kind of abnormaly. In this paper the corectness of the mechanism was quantitatively tested. On the basis of the theory, we inversed the rapid variation of local stress field prior to some earthquakes. For example, about 30 days prior to the earthquake of magnitude 4.3 occurred at Weijiaquan area of NE of wulumuqi on9 July 1979, the vertical component of underground stress aeted on water layer located in the depth of 1600m at No. Swell suddenly was increased by 1.3×10~5Pa and after about several ten minutes it renewed; about 4 days prior to the earthquake of magnitude 5.3 occurred at the same area on 1 June 1983, the stress acted on the same water layer at No. 5 well suddenly was increased by 4×10~3Pa and after 11 hours and 40 minutes it renewed; and about 2 months prior to the earthquake of magnitude 6.5 occurred in the area on 13 November 1965, the stress suddenly was i ncreased by 1.7×10~5Pa; and after everal ten minutes it renewed. These phenomena al so have been discussed in this paper.
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【References】
Chinese Journal Full-text Database 2 Hits
1 Zhang Zhaodong(Seismological Bureau of Shandong Province)Zheng Jinlian(Institute of Geophysics, State Sasmologtcat Bureau)Feng Chugang(Shanghai Observatory, Academta Sinica);A NEW METHOD FOR ESTIMATING ADJUSTMENT OF STRESS FIELD CAUSED BY EARTHQUAKES[J];Earthquake;1988-03
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【Co-references】
Chinese Journal Full-text Database 3 Hits
1 Zhang Zhaodong (Seismological Bureau of Shandong Province)Zheng Jinhan(Institute of Geophysics, State Seismological Bureau)Feng Chugang (Shanghai Observatory, Academic Sinica);EFFECTS OF ATMOSPHERIC PRESSURE ON OBSERVATIONS OF WELL WATER LEVEL VARIATIONS[J];Earthquake;1986-01
2 Su Gang Xu Shiaoxie;EARTHQUAKE PRECURSOR PHENOMENA AND CRUSTAL BUCKLING[J];Journal of Seismological Research;1985-04
3 Li Fangquan Liu Guangxun(Seismogeological Brigade, SSB);STRESS MEASUREMENT, STRESS STATE OF UPPER CRUST AND EARTHQUAKE RESEARCH[J];Earthquake Research In China;1986-01
【Secondary References】
Chinese Journal Full-text Database 10 Hits
1 Zhang Zhaodong (Seismological Bureau of Shandong Province);COMPARIASON AND ANALYSIS OF OBSERVATIONAL WATER-LEVEL TIDE OF ARTESIAN WELL AND GRAVITY SOLID TIDE[J];Earthquake;1991-02
2 HUANG Fu-qiong~1,YUN Rui~1,CHEN Yong~2, WANG Wen-xu~3,GENG Jie~4,GU Jin-ping~1 (1.Center for Analysis and Prediction, CSB, Beijing 100036; 2.China Seismological Bureau, Beijing 100036; 3.Seismological Bureau of Henan Province, Zhengzhou 450000; 4.Seismological Bureau of Shandong Province, Jinan 250014, China);Study of present tectonic stress field of Pan-North China region based on ground water level dynamic in deep wells[J];Earthquake;2004-01
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4 ZHANG ZHAODONG(Seismological Bureau of Shandong Province)ZHENG JINHAN(Institute of Geophysics,Stiate Selsmological Bureau)FENG CHUGANG(Shanghai Astronomical Observatory,Academia Sinca);ADJUSTMENT VARIATION OF STRESS FIELD IN CHINA WITH THE AKITA EARTHQUAKE IN JAPAN IN 1983[J];Acta Seismologica Sinica;1990-01
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9 Zhang zhaodong(Seismological Bureau of Shandong Province, Jinan) Zheng Jinhan(Geophysical Institute, SSB Beijing)Feng Chugang(Shanghai Astronomical Observatory, Aeademica Sinica, Shanghai)Zhang Guangcheng(Geologic and Mineral Bureau of Shandong Province, Jinan);THE COMPARISON OF THE THREE METHODS OF INVERSION OF STRSS CHANGES OF AQUIFERS USING STEP CHANGES OF WELL LEVEL[J];North China Earthquake Sciences;1993-01
10 LIU Yuan-sheng, ZHANG Zhao-dong, HE Jun, WU Jian-guo (Seismological Bureau of Shandong Province, Jinan, 250014, China);New progress in the study of oil well dynamics and earthquake[J];North China Earthquake Sciences;2004-04
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