Taylor Swift fans danced so hard during her concerts they created seismic activity in Edinburgh, Scotland

Taylor Swift's Era's Tour has broken huge records in ticket sales, but her concerts in Edinburgh, Scotland, just tipped another scale — the seismic scale. Fans at her concerts last weekend danced so hard they generated seismic activity that was felt nearly four miles away from the Murrayfield Stadium, according to the British Geological Survey.

BGS says three songs consistently generated the most seismic activity during each of the three Edinburgh shows: "…Ready For It?" "Cruel Summer" and "champagne problems." 

"…Ready For It?" starts with a loud, blown out bass beat and is 160 beats per minute, making it the perfect song for triggering seismic shakes, BGS said. The crowd transmitted about 80 kilowatts of power, or about the amount of power created by 10 to 16 car batteries, according to BGS.