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《Platean Earthquake Research》 1999-04
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PRECURSORY ANOMALOUS CHARACTERISTICS OF HENANCOUNTY EARTHQUAKE WITH M S5.1 IN QINHAI PROVICE

Zhang Min Xu Qin ① Yan Chengping ② (Seismological Bureau of Qinghai Province,Xining 810001) (Seismological Bureau of Xining City,Qinghai Province, Xining 810001) ① (Seismological Station of Ledu,Qinghai Province,Ledu 810700) ②  
The authors have systematically analysed the precursory anomalous characteristics before Henan county earthquake with Ms5.1 on Sep.27,1999 in Qinghai province,they think the precursory time was presented by longmidiumterm,mediumterm,shortterm and impendingterm anomalies,the precursory space was presented from field to source to field migrating process,and the main characteristics were negative anomalies.They have thought this earthquake maybe a signal earthquake in KusaihuMaqu fault zone.
【CateGory Index】: P315.72
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