【摘要】 本文处理了自本世纪以来一些大震、强震、中等强度地震和小震前兆序列,得到震前前兆活动超前时间T₁、T₂和远震源区长轴L₁,近震源区长轴L₂与主震震级的公式: 大震M≥7.0 logT₁=0.77M-4.32 logT₂=0.54M-3.26 logL₁=0.17M+1.22 logL₂=0.28M-0.14 强震6.9≥M≥6.0 logT₁=0.97M-5.60 logT₂=0.58M-3.87 logL₁=0.57M-1.43 中等强度地震5.9≥M≥5.0 logT₁=1.08M-6.05 logT₂=0.68M-4.40 logL₁=0.18M+1.10 logL₂=0.43M-0.87 小震4.9≥M≥4.0 logT₁=0.60M-3.50 logT₂=1.47M-8.63 logL₁=0.13M+1.38更多还原

【Abstract】 In this paper, precursory sequences of a number of great, strong, moderate and small earthquakes are analysed, obtaining empirical formulas for the advance time T1 and T2 of the precursory activities before an event, the long axes L1 and L2 of the source region of the remote and near earthquakes, respectively, and the magnitude of the main shock.For great shocks of M≥7.0:logT1=0.77M-4.32logT2=0.54M-3.26logL1=0.17M+1.22logL2=0.28M-0.14For strong events of 6.9≥M≥6.0:logT1=0.97M-5.60logT2,=Q.58M-3.87logL1=0.57M-1.43For moderate earthquakes of 5.9≥M≥5.0:logT1=1.08M-6.05logT2=0.68M-4.40logL1=0.18M+1.10logL2=0.43M-0.87For small shocks of 4.9≥M≥4.0:logT1=0.60M-3.50logT2 = 1.47M-8.63LogL1=0.13M+1.38更多还原