There was no earthquake recorded in southern Chinese city at the time
                                
                                
                                    (Newser) -
                                    There were  scenes of panic  in Shenzhen, southern China Tuesday afternoon as one of the city's tallest skyscrapers started shaking. Thousands of workers and shoppers ran to safety as the 71-story SEG Plaza wobbled, the  BBC  reports. Authorities say the 21-year-old building was safely evacuated, along with some neighboring...