Taylor Swift concerts in the US city of Seattle generated seismic activity equivalent to a magnitude 2.3 earthquake, a seismologist says.
Seismic data from Swift's two shows at the Lumen Field stadium last week, where she performed in front of a total of 144,000 fans, has been analysed. Seismologist Jackie Caplan-Auerbach said the activity was caused by Swift's adoring fans or the sound system.
The shows beat the previous seismic activity record at the Seattle stadium. The magnitude 2.0 "Beast Quake" in 2011 was generated by American football fans celebrating a touchdown for the Seattle Seahawks during a game against the New Orleans Saints.
Caplan-Auerbach told CNN she saw the comparison between Swift's concerts and the Beast Quake, so she decided to compare seismic data from the events.
"I grabbed the data from both nights of the concert and quickly noticed they were clearly the same pattern of signals," she said.
"If I overlay them on top of each other, they're nearly identical."
While the difference between the football game and Swift's concerts was just 0.3, Swifties still beat out the Beast Quake.
"The shaking was twice as strong as 'Beast Quake'. It absolutely doubled it," Caplan-Auerbach told CNN.
Mouse Reush, a seismologist at the Pacific Northwest Seismic Network, looked at the data to figure out which songs had the biggest seismic impact at Swift's concert. Fittingly, 'Shake It Off' had the loudest response, along with 'Blank Space'.
After the Seattle concerts, Swift took to Instagram to thank her fans for coming to see her.
"Seattle that was genuinely one of my favourite weekends ever. Thank you for everything. All the cheering, screaming, jumping, dancing, singing at the top of your lungs."
Her Seattle concerts came towards the end of the US leg of the Eras tour, which is her first tour in five years.
Music concerts have been known to cause seismic activity before. A Foo Fighters concert in front of 50,000 fans in New Zealand in 2011 caused geological vibrations on par with "volcanic tremors", GeoNet said at the time.
