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本文详细讨论了１５００年云南宜良地震的发震构造。认为小江东支断裂带内的小新街—徐家渡断裂是１５００年宜良地震的发震构造，本次地震的宏观震中位于宜良县城西南２０ｋｍ的腊介村一带（北纬２４°４６＇，东经１０３°４＇）。较之１９８３年出版的《中国地震目录》所定的震中位置，向西南推移２０ｋｍ，该区北东、北西的活动断层对地震没有明显的控制作用，本次地震的发生与小江东支断裂带内的次级拉分盆地内部张剪切断层与盆地一侧新活动幅度大的次级走滑断层的相互作用密切相关。
This paper discusses in detail the seismogenic structure of the Yiliang earthquake in Yunnan Province in 1500. It is considered that the Xiao-Xin-Xu-Xujiantu fault in the Xiaojian-Zhizu fault zone is the seismogenic structure of the 1500 Yeliang earthquake. The macro epicenter of this earthquake is located in the area of Laxijian Village 20km southwest of Yiliang County (latitude 24 ° 46 ’north, east longitude 103 ° 4 ’). Compared with the epicentral location set in the “China Earthquake Catalog” published in 1983, the fault moved 20km to the southwest, and the active faults in the NE and NW have no significant control over the earthquake. The occurrence of this earthquake is similar to that in the Xiaojijudongzhi fault zone Of the second sub-basin is closely related to the interaction of the secondary shear-strike faults with large amplitude of new activity on the basin side.