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本文对唐山地震前后香河短水准资料进行了剖析,肯定了香河短水准在唐山震前的中短期异常和震时观测到的同震变化。通过计算在水平应力作用下的线源倾斜场理论值,验证了唐山震前香河短水准前兆异常的可靠性;同时,用弹性位错理论模式计算香河台及周围的震时倾斜场,进一步证明香河台震时观测到的同震变化的可能性。对计算结果中理沦值和实测值存在的差异作了理论上的解释。
This paper analyzes the short-term data of Xianghe before and after the Tangshan earthquake and affirms the coseismic changes observed in the short-term anomalies and shocks of the Xianghe short-term before the Tangshan earthquake. The reliability of Xianghe short-level precursory anomaly before Tangshan earthquake is verified by calculating the theoretical value of the source tilt field under the horizontal stress. At the same time, the elastic-dislocation theory model is used to calculate the tipping time of Xianghe Station and its surroundings, which further proves The possibility of coseismic changes observed at the Xianghe earthquake. The differences between theoretical value and actual value in the calculation result are theoretically explained.