本文对强震前区域性干旱的一种可能的成因进行了探讨，提出震前地壳中裂隙数量增多、尺度增大造成的震区附近上空气溶胶粒子增多可以是干旱的原因。震区及其下风向地区上空气溶胶粒子过饱和会阻碍云中水滴的生长，造成旱象。震区气溶胶粒子的增多也有可能使未来震区当地降水偏多，而其下风地区却无雨可降成为旱区。对由于震前气溶胶增多造成长期干旱的地区，未来强震的位置预计会在旱区内或其上风地区。% Droughts before strong earthquakes may be caused by the increase of aerosol above seismic areas. The increase come from the raise in number and enlarge on scale of the fractures in the crust of the Earth due to the stress increase prior to strong shocks. There are two mechanics on this in detail:more water fall in seismic areas lead no water to fall in advancing route of transit air masses, or over saturation aerosol particles hinder water drops to grow. For the areas drought lasting the windward area of the transit air masses might be the position of future strong earthquakes.
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