One of Chinaâs tallest skyscrapers began shaking mysteriously. Residents of one of the tallest skyscrapers in China â the 980ft SEG Plaza, were evacuated after it began mysteriously shaking. The people were running for safety while the building was swinging. As Daily Mail reports, the incident occurred on Tuesday at around 1 pm. in the city of Shenzhen. Credits: South China Morning Post Although many believed there was an earthquake, authorities claimed that no earthquakes have been recorded at the time. At 2:40 pm, about two hours after the unusual activity began, the 79-story skyscraper was closed down. Currently, emergency teams are looking for the actual cause of the sudden shake.