1961年3月8日宜都潘家湾、1964年9月5日郧西安家、1969年1月2日保康马良坪发生的三次中强震,由于种种历史原因,震级始终未能统二确定;历年来汇编的地震目录和报告也很不一致。为了更好地研究这些地区的地震活动性,有必要重新确定这三次地震的震级。 On March 8, 1961, Panjiawan, Yidu, September 5, 1964, three moderate and strong earthquakes occurred in Ma Xianping, Baokang on January 2, 1969. Due to various historical reasons, the magnitude never failed to be unified It is also very inconsistent with the catalogs and reports of earthquakes compiled over the years. In order to better study the seismicity of these areas, it is necessary to re-determine the magnitude of these three earthquakes.