Chinese Skyscraper Shenzhen Evacuated, Mysteriously Began Shaking without earthquake

Building engineers are left scratching their heads as to what caused the 76-story SEG Plaza tower in Shenzhen to suddenly start shaking on Wednesday.

Seismologists reported no nearby earthquake activity, nor were there any documented strong wind gusts. A New York Times journalist based in nearby Hong Kong tweeted that there are reports the building "tilted on its foundations."

Standing at over 1,100 feet tall when the antenna height is included, the SEG Plaza is just over 20 years old, having broken records with its rapid construction in the late '90s.

The skyscraper is mostly used as for business offices, with a multi-story electronics mall at the bottom, and four floors underground for parking.