三十余年来云南气压涨落的致震方式和阈值研究

本文以孕震系统在爆发前夕的外敏性及外力的非线性作用为物理基础，对大气扰动下的地震爆发问题进行了初步探讨，不仅给出了三十余年来整个云南气压场的归－化原则以及四次７级大震前震中附近的气压巨涨落特征，而且还对滇东，滇西北，滇西南等地区分带归纳建立了具有实用价值的气发震指标。这些自然共性的揭示，既是对外力效应的认证，也丰富了短临地震预报的科学依据。

A STUDY ON THE MODE CAUSING EARTHQUAKE BY FLUCTUATION OF ATMOSPHERIC PRESSURE AND THRESHOLD VALUE IN YUNNAN IN RECENT THIRTY AND MORE

On the physical basis of external sensitivity of seismogenic system prior to earthquake eruption and nonlinear effect under external force, the authors preliminarily approarch the earthquake eruption under atmospheric disturbance, and not only give normalized principle of atmospheric pressure field in the whole Yunnan in recent thirty years and more, tremendous fluctuation features of atmospheric pressure around the epicenters before the four large earthquakes with M= 7 but also offer practical seismogenic indexes of atmospheric pressure in eastern Yunnan, northwestern Yunnan and southwestern Yunnan respectively. The revelation of natural general characters not only confirms external force effect but also enrich scientific basis of short-impending earthquake prediction.