1976年是我国地震史上少有的活动高潮年份,这一年先后在龙陵、唐山、松潘和盐源发生了七次7级以上的大地震。同年9月23日,宁夏、内蒙古交界处的巴音木仁附近发生了6.2级地震,这是宁夏自1920年海原8.5级大震后发生的第一次大于6级的地震。现将这次地震的活动特征介绍如下。 1976 is the rare high tide year in the history of China’s earthquake. Seven earthquakes of magnitude 7 or above occurred successively in Longling, Tangshan, Songpan and Yanyuan this year. On September 23 of the same year, a magnitude 6.2 earthquake near Bayin Muren at the junction of Ningxia and Inner Mongolia was the first earthquake greater than magnitude 6 that occurred in Ningxia since the Haiyuan M 8.5 earthquake in 1920. Now the activities of the earthquake characteristics are described below.