There's really no arguing that the Foo Fighters rock. That's what they do for a living. But what's also indisputable now is the fact that they rock so hard that they make the ground shake…literally. With a little help from fans, of course.

According to GeoNet, two seismic stations in Auckland recorded the ground shaking during the band's gig at Western Springs in New Zealand on Tuesday (Dec. 13.) Essentially, Dave Grohl and co. caused an earthquake of sorts.

The stations, positioned about 2 kilomters from the gig location, recorded a strong, low frequency signal. The first vibrations were recorded around 7:30 PM, which was during the Jack Black-led Tenacious D set. However, a much larger shake was detected at around 8:20, when the Foos took the stage. The activity stopped when the gig did, at 11 PM.

We won’t get into all the nerdy, seismic activity other than to say that the vibrations were recorded at semi-continuous, harmonic signal, shaking three times per second and in rhythmic fashion. The signal experience lulls during the peaks and valleys in the intensity of the songs. Much of the shaking was a result of 50,000 Foos fans dancing and moshing, the sound system and the bass frequencies.

The last time the Auckland stations picked up sounds like were at the Rugby World Cup finals. So we can surmise that sports hooligans and rock fans shake the earth, huh?