Basing upon the date of seismological observations, this paper has discussed the stress field of seven zones of Ninxia region and has given the focal mechanism solutions of sixteen moderate earthquakes. According to the crustal deformation, the stress fields of the region are mainly subjected to a strong NE-NEE compressive stress. The stress field is controlled by the joint action of the Indian and Pacific plates, and the former plays the major function.
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李孟銮,赵知军.宁夏地区的震源机制与应力场[J].地震工程学报,1981,3(4):49-55. Li Mengluan, Zhao Zhijun. FOCAL MECHANISM AND STRESS FIELD OF NINXIA REGION[J]. China Earthquake Engineering Journal,1981,3(4):49-55.