Taylor Swift’s concerts in the US city of Seattle generated seismic activity equivalent to a 2.3 magnitude earthquake, a seismologist has said.

The data was recorded at Swift’s sell-out Eras tour performances at Lumen Field on 22 and 23 July.

Seismologist Jackie Caplan-Auerbach said the activity was caused by Swift’s fans or the sound system.

The shows beat the previous record in Seattle, known as the city’s “Beast Quake” in 2011.

The Seattle concerts were played in front of a total of 144,000 fans over two nights.

Posting on Instagram afterwards, Swift said: “Seattle that was genuinely one of my favorite weekends ever. Thank you for everything. All the cheering, screaming, jumping, dancing, singing at the top of your lungs.”

The Cruel Summer singer’s Seattle concerts came towards the end of the US leg of the Eras tour – her first tour in five years.