the earthquake caused light damage in epicentral region and was felt as far away as qinhuangdao city, beijing city, tianjin city, langfang city, and qinglong county.
尽管地震造成的破坏轻微,但有感范围较大,在秦皇岛市、青龙县、北京市、廊坊市、天津市等地均有震感。
the absolute stress value determined within the epicentral region of a strong earthquake is usually less than that of the region outside it.
大震后在震中区测得的应力值比离震中较远处测得的应力值要低。
the douhe normal fault extends right over the epicentral region of tangshan city.
陡河正断层刚好插到唐山市震中区的正下方。
the stress field of periphery of the epicentral region transformed from positive stress into negative stress, and the value of the positive stress increased gradually before the earthquakes.
地震前,震中区周围应力场发生转向,由正应力区变为负应力区,同时正应力的量值逐渐增大。