The relationship of inferring the state of additional strain by additional principal stress ratio was derived from physical formula of elastodynamics and the relation between additional stress field and fault activities was analyzed.Based on the calculation results of additional principal stress ratio for the ground stress stations in Gansu Province from 1983 to 1995,the correlation of additional principal stress ratio with moderate earthquakes was studied,the seismogenic mechanisms were further discussed and some preliminary results were got.
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李步云.甘肃附加应力场预测地震研究[J].地震工程学报,1998,20(4):63-69. Li Buyun. PREDICTING EARTHQUAKES BASED ON THE CHANGE OF THE ADDITIONAL STRESS FIELD IN GANSU[J]. China Earthquake Engineering Journal,1998,20(4):63-69.