A violent earthquake of 7.8 grade in magnitude with epicentral intensities of XI occur-red in Tangshan,a coastal city in east part of China,on 28th July 1976 before dawn.

• 1976年7月28日凌晨；唐山市发生里氏7.；8级大地震。震中烈度为11度；死亡242；000多人；重伤164；000多人。我军迅速参加救灾。