云南省中强震前气压场的特征分析

THE CHARACTERISTICS OF ATMOSPHERIC PRESSURE FIELD BEFORE STRONG AND MODERATE EARTHQUAKES OCCURRED IN YUNNAN PROVINCE

  • 摘要: 为探索地震的短期预报,普查了云南省1960—1974年期间发生的中强震震前气压场的时空变化,通过最优二分割方法,筛选出来了与云南三个地震带有关的若干气压相关区(站).文末给出的1975—1977年内符检验结果表明,气压异常可能是地震近期发生的一个征兆.

     

    Abstract: In order to seek for short-range precursory phenomena of earthquakes, time space changes of the atmospheric pressure field before strong and moderate earthquakes (Ms5.0) occurred during 1960—1974 in Yunnan province have been investigated.Some correlative regions (or stations) of the atmospheric pressure related to three seismic active belts in Yunnan province were selected by the statistical method of optimal two-way classification.Finally, the results of prediction test within the period 1975—1977 indicate that the anomaly of atmospheric pressure may possibly be an indication of short-range precursor of the occurrence of earthquakes.

     

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