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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T_1、T_2和远震源区长轴L_1,近震源区长轴L_2与主震震级的公式: 大震M≥7.0 logT_1=0.77M-4.32 logT_2=0.54M-3.26 logL_1=0.17M+1.22 logL_2=0.28M-0.14 强震6.9≥M≥6.0 logT_1=0.97M-5.60 logT_2=0.58M-3.87 logL_1=0.57M-1.43 中等强度地震5.9≥M≥5.0 logT_1=1.08M-6.05 logT_2=0.68M-4.40 logL_1=0.18M+1.10 logL_2=0.43M-0.87 小震4.9≥M≥4.0 logT_1=0.60M-3.50 logT_2=1.47M-8.63 logL_1=0.13M+1.38
This paper deals with some major earthquakes, strong earthquakes, moderate earthquakes and precursory sequences of small earthquakes since the present century. The precursory precursory lead time T_1 and T_2, the long axis L_1 of the tectonic source region, the long axis L_2 of the near source region and the main shocks Magnitude M≥7.0 logT_1 = 0.77M-4.32 logT_2 = 0.54M-3.26 logL_1 = 0.17M + 1.22 logL_2 = 0.28M-0.14 Strong Earthquake 6.9≥M≥6.0 logT_1 = 0.97M-5.60 logT_2 = 0.58M -3.87 logL_1 = 0.57M-1.43 Moderate Intensity Seismic 5.9 ≥ M ≥5.0 logT_1 = 1.08M-6.05 logT_2 = 0.68M-4.40 logL_1 = 0.18M + 1.10 logL_2 = 0.43M-0.87 Minor Earthquake 4.9 ≥ M ≥ 4.0 logT_1 = 0.60 M-3.50 logT_2 = 1.47M-8.63 logL_1 = 0.13M + 1.38