1On July 28th, 976, the clock went back to 30 years ago, and history froze at 3: 42: 56 in the morning. That terrible moment was black ... in the depth of Tangshan's crust 12 km, the huge energy accumulated here for a long time suddenly broke out, which was equivalent to the violent explosion of 800 tons of yellow explosives under the city. At one time, the earth trembled and the strata shook, which was the worst in human history. In a blink of an eye, Tangshan city was in ruins, with 2424 19 people killed (including Tianjin and other disaster areas), more than 360,000 seriously injured, more than 700,000 slightly injured, 15886 families disintegrated, 782 1 wife widowed, 8,047 husbands widowed, 38/kloc-

Tangshan earthquake, with magnitude of 7.8 and epicentre intensity of 1 1 degree, starts from Yuehe Township in the suburbs in the east, reaches Liangjiatun and Hebei Institute of Mining and Metallurgy in the west, and reaches Nvzhizhai, 2 1 middle school, Jiagezhuang and shooting range in the south. It is oval with an area of about 47 square kilometers and a long axis of about 65438. The area with the intensity of 10 degree is ladle-shaped, narrow in northeast and wide in southwest, 36 kilometers long and 15 kilometers wide, covering an area of 320 square kilometers. Tangshan area is in the 7-degree zone. The land felt range of Tangshan earthquake is about 210.7 million square kilometers, and there are obvious earthquakes in Manchuria, Wuzhong, Ningxia and Zhengyang, Henan.

The casualties in Tangshan earthquake were mainly due to the damage of houses. There are more than 680,000 urban and rural civil buildings in Tangshan, covering an area of about 65,438+/kloc-0.0 million square meters. More than 650,000 buildings were damaged by the earthquake, accounting for 95%. Tangshan Railway Station, Xiaoshan, Jiefang Road, Xie Zhuang in Song Dynasty, Fuxing Road, Xinlizhuang, Fengjing and Liangtun were all destroyed.

The Tangshan earthquake caused great losses to the national economy. More than 280 kilometers of asphalt road was seriously damaged. 7 1 large and medium-sized bridges, 0/60 small bridges and 0/10,000 road culverts collapsed and cracked, and the roadbed of major highways leading to Tianjin, Beijing, Northeast China and coastal areas collapsed or cracked. Expressway traffic is basically cut off; The east-west railway trunk line was cut off and the Beijing-Shenyang railway was paralyzed.