How did the Tangshan earthquake happen?

The large-scale casualties and losses caused by Tangshan earthquake are mainly attributed to the time and suddenness of the earthquake. The Tangshan earthquake did not have a small foreshock, and it happened in the early morning when people were asleep, which made most people unprepared. Few buildings have a high seismic grade, and the whole city is located in the relatively unstable alluvial soil.

20 12 An earthquake occurred in Tangshan on May 28th.

On May 28th 10: 22, an earthquake of magnitude 4.8 occurred at the junction of Tangshan City and Luanxian County (39.7 degrees north latitude, 1 18.5 degrees east longitude) with a focal depth of 8 kilometers. Some areas in Beijing have obvious earthquakes, and Tianjin also has earthquakes. Zheng, spokesman of Tangshan Earthquake Administration, said that there will be no destructive earthquake in Tangshan, and the general public are requested to maintain normal production and living order.

Extended data;

1At 3: 42: 53.8 on July 28th, 976, an earthquake with a magnitude of 7.8 on the Richter scale (moment 7.5) occurred in Fengnan area, Tangshan, Hebei, China (east longitude 1 18.2, north latitude 39.6), with the epicenter intensity of1/kloc-0. The earthquake killed 242,769 people, and 16485 1 person was seriously injured, ranking second in the history of earthquakes in the world in the 20th century, second only to offshore earthquakes.

East longitude 1 18. 1 degree, north latitude 39.6 degrees, a strong earthquake measuring 7.8 on the Richter scale suddenly occurred in Fengnan District, Tangshan City, Hebei Province, China. Twenty-three seconds later, Tangshan was reduced to ruins.

Of the 682,267 civil buildings, 65,665,438+036 collapsed and were seriously damaged, 242,769 people died, 65,438+064,856,5438+0 people were seriously injured, and 4,204 children were orphaned. The direct economic losses amounted to more than 3 billion yuan. The scene of the earthquake victims is extremely tragic and rare in the world.

Beijing, the capital of China, is shaking, and the tall beams and columns of Tiananmen Gate are convulsively "quacking". From Bohai Bay to Inner Mongolia and Ningxia, and from the south of Heilongjiang to the north of the Yangtze River, people in this land of China feel abnormal shock and fear.

Reference source; Baidu Encyclopedia -7.28 Tangshan Earthquake