1976 Tangshan earthquake
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| Date |
July 28, 1976 (China time zone) |
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| Magnitude | 7.8Mw |
| Depth | 7.5 |
| Epicenter | 39°36′N 118°12′E / 39.60°N 118.20°E （Tangshan, Hebei, China） |
| Areas affected | People's Republic of China |
| Casualties | 242,769–700,000 dead (2nd deadliest earthquake of modern history) |
The Tangshan earthquake, also known as the Great Tangshan earthquake, was a natural disaster that occurred on July 28, 1976. It is believed to be the largest earthquake of the 20th century by death toll. The epicenter of the earthquake was near Tangshan in Hebei, People's Republic of China, an industrial city with approximately one million inhabitants. The number of deaths initially reported by the Chinese government was 655,000, but this number has since been stated to be around 240,000 to 255,000. Another report indicates that the actual death toll was much higher, at approximately 650,000, and explains that the lower estimates are limited to Tangshan and exclude fatalities in the densely populated surrounding areas.
A further 164,000 people were recorded as being severely injured. The earthquake occurred between a series of political events involving the Communist Party of China, ultimately leading to the expulsion of the ruling Gang of Four by Mao Zedong's chosen successor, Hua Guofeng. In traditional Chinese thought, natural disasters are seen as a precursor of dynastic change.
The earthquake hit in the early morning and lasted 14 to 16 seconds. Chinese government official sources state a magnitude of 7.8 on the Richter magnitude scale, though some sources listed it as high as 8.2. It was followed by a major 7.1 magnitude aftershock some 16 hours later, increasing the death toll to over 255,000. The earthquake was generated by the 25-mile-long Tangshan Fault, which runs near the city and ruptured due to tectonic forces caused by the Amurian Plate sliding past the Eurasian Plate.
Well water in a village outside of Tangshan reportedly rose and fell three times the day before the earthquake. Gas began to spout out of a well in another village on July 12 and then increased on July 25 and July 26. City dwellers from the "downtown" area who had fish discovered that the fish were restless, jumping out of the aquarium as if wanting to escape; therefore, some animals may have anticipated the earthquake.
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