Fans singing and jumping repeatedly caused ground vibrations, equivalent to a 2.3 magnitude earthquake! American Singer Concert Ground | Concert | Fans
American singer Taylor Swift recently held two consecutive nights of concerts in Seattle, and fans responded warmly. The ground shaking caused by the continuous singing and jumping was equivalent to a 2.3 magnitude earthquake.
According to CNN on the 28th, Swift held a concert at the Lumen Stadium in Seattle on the evenings of the 22nd and 23rd, attracting 144000 viewers. Geography professor Jackie Capura Orbak from West Washington University recorded a total of 10 hours of data and found data equivalent to a 2.3 magnitude earthquake. She believes that this is caused by live amplifiers playing music and fans dancing. "Music, amplifiers, beats, these energies go straight into the ground, causing vibrations."
There have been precedents of large-scale gatherings triggering seismic activity. During the 2011 American rugby match between the Seattle Seahawks and the New Orleans Saints at home, a player from the Seattle Seahawks scored a touchdown, and the audience cheered and jumped, triggering an earthquake equivalent to 2.0 magnitude. However, it only lasted for a few seconds, much shorter than the earthquake caused by the Swift concert.