The Richter scale is 7.8 and the moment scale is 7.5.
Tangshan earthquake refers to an earthquake of magnitude 7.8 that occurred in Fengnan District, Tangshan City, Hebei Province, China at 3: 42 am on July 28th, 1976.
1At 03: 42: 53.8 on July 28th, 976, an earthquake measuring 7.8 on the Richter scale (moment 7.5) occurred in Tangshan and Fengnan, Hebei Province, China (east longitude 1 18.2, north latitude 39.6), with the epicenter intensity of1/kloc. Twenty-three seconds later, Tangshan was reduced to ruins, and 656 136 civil buildings collapsed and were seriously damaged, resulting in a direct economic loss of more than 3 billion yuan, resulting in 242,769 deaths and 654,380+064,000 serious injuries.
Tangshan earthquake ranked third in the world earthquake history in the 20th century, second only to Haiyuan earthquake.
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Influence of Tangshan earthquake
The Tangshan earthquake occurred in 1976, which was a major turning point in modern China. It not only caused three times as many casualties as the Wenchuan earthquake, but also occurred in the political centers of China, such as Beijing, Tianjin and Tangshan. After the death of three great men, Zhou Enlai, Zhu De and Mao Zedong, the Gang of Four attempted to usurp the party and seize power. Even in the face of great disasters, they still insisted on political struggle as the key link, which greatly affected the development of disaster relief work.
All this made the people and the far-sighted senior leaders thoroughly understand the evil plot of the Gang of Four, and finally took decisive measures to end the "Cultural Revolution". It can be said that the Tangshan earthquake was the catalyst for smashing the Gang of Four and ending the turmoil of the Cultural Revolution. Its historical significance goes far beyond the disaster itself.
Baidu Encyclopedia-Tangshan Earthquake