一、前言 1976年7月28日唐山市发生了7.8级强烈地震,震惊了中外地震工作者,大家都在思考:唐山历史上并末发生过七级以上地震,唐山的基本烈度为六度,……等,总之对这次强震的发生感到困惑不解。事后,各家对唐山地区进行了一系列的研究,从地质构造、卫片解析、新构造运动特征等各方面找寻原因,最后的认识也是各式各样的,尤其对发震构造背景未能取得一致认识。近年来,我们从事全新世古地震研究工作,先后对北京平原、滇西北、红河断裂带 Foreword July 28, 1976 Tangshan City, a magnitude 7.8 earthquake shocked Chinese and foreign earthquake workers, we are thinking: Tangshan history occurred at the end of more than seven earthquakes, Tangshan basic intensity of six degrees, ...... In short, puzzled by the occurrence of this strong earthquake. Afterwards, each family carried out a series of researches on Tangshan area, looking for the reasons from the aspects of geological structure, satellite analysis and neotectonic movement. The final cognition is also varied, especially for the failure of seismogenic tectonic setting Get unanimous understanding. In recent years, we are engaged in Holocene paleoseismic research work, successively on the Beijing Plain, northwestern Yunnan, Honghe fault zone