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《NORTHWESTERN SEISMOLOGICAL JOURNAL》 2000-01
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ANOMALY OF STRAIN DISTURBANCE BEFORE STRONG EARTHQUAKES IN YUNNAN REGION

QIAN Xiao dong, LIU Zu yin (Seismological Bureau of Yunnan Province,Kunming 650041,China)  
Strain disturbance ε i values before 5 strong earthquakes(M L≥6.5) in Yunnan region have been calculated and analyzed. The results indicate that about 5~8 years before earthquake ε i values of earthquakes with magnitude of normalized 4 show obviously the abnormal high value; The ε i values are lower in the coming epicenter,but increase in periphery of the epicenter,developing the gap; The ε i values show a tendency from a random and scattered distribution to converging towards epicenter and strengthening.
【CateGory Index】: P315.727
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1 Qian Xiaodong;Liu Zuyin(Seismological Bureau of Yunnan Province, Kunming, 650041 );SEIMICITY CHARACTERISTICS BEFORE NINGLANG,YUNNAN ON BOV.19, 1998[J];SEISMOLOGICAL RESEARCH OF NORTHEAST CHINA;1999-03
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