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本文初步分析了近两年我国西南地区大气压力场(100多个台站资料)的变化对云南地震的影响,发现当云南地区外围(主要是四川盆地)24小时变压ΔP_(ij)现高值,并达到一定指标,即: ΔP_(ij)≥1.4σ_j,而在云南同时出现相对低压时,省内及邻近地区就有可能发生M_L≥4.0级地震,一般在7日或5日内发震。发震地点几乎都分布在低压强度最大的地区或高、低压切变带上。文章最后就这两者间的可能联系作了简要讨论。
This paper analyzes the impact of the change of atmospheric pressure field (more than 100 station data) on the earthquake in Yunnan in the past two years in Southwest China. It is found that ΔP_ (ij) is high at the periphery of Yunnan (mainly in the Sichuan Basin) Value and reach a certain index, that is: ΔP_ (ij) ≥1.4σ_j. When relative low pressure occurs in Yunnan at the same time, M_L≥4.0 earthquakes are likely to occur in the province and adjacent areas, and earthquakes usually occur within 7 days or 5 days . Almost all of the seismogenic locations are located in areas with the highest low-pressure intensity or high and low shear zones. The article concludes with a brief discussion of the possible links between the two.