Buildings swayed in Charlotte, North Carolina on Tuesday, prompting some to believe that an earthquake had struck.
Occupants of high-rise buildings quickly evacuated after feeling buildings sway and shake on Tuesday morning, close to noon.
But NBC Charlotte emphasized that the shaking did not come from seismic activity.
“The Charlotte Fire Department says uptown shaking due to issue with HVAC system in building in 200 block Tryon,” it said.
Earthquakes are rare in the area.
A number of people suffered injuries due to the shaking, including cuts and scrapes.
People were wondering what happened.
“What the Heck is going on uptown?” asked one via Twitter.
“Everybody ok? We felt some shaking here at LCI Main,” said another.