In 23 seconds at 3:42 a.m. on July 28, 1976, an earthquake officially announced to be of 7.8 magnitude on the Richter scale totally demolished Tangshan, an industrial city of one million. The quake,...
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In 23 seconds at 3:42 a.m. on July 28, 1976, an earthquake officially announced to be of 7.8 magnitude on the Richter scale totally demolished Tangshan, an industrial city of one million. The quake,...