本文初次讨论了我国西南地区气压场的变化与云南中强震发生的统计联系,发现震前震区常受相对低压控制,而外围多为相对高压的形势。进而以最优二分割法,对地面气压场进行了相关筛选,分别建立了滇东、楚雄—玉溪、滇西三个地震带的短临预报格式,并从区域应力场的角度做了一定的物理解释。 This paper discusses for the first time the statistical relation between the change of atmospheric pressure field in southwest China and the moderate-strong earthquakes in Yunnan Province. It is found that the earthquake area is usually controlled by relatively low pressure before the earthquake, while the periphery is mostly relatively high pressure. Then, by using the optimal dichotomy method, the ground pressure fields are screened, and the short-and-short-term prediction models of the three seismic belts in eastern Yunnan, Chuxiong-Yuxi and Western Yunnan are established respectively. From the perspective of regional stress field, Physical explanation.