By 3 News online staff
The Foo Fighters did more than rock the crowd at their Auckland gig on Tuesday, but literally shook the ground in surrounding neighbourhoods.
Two seismic stations in Herne Bay and Eden Park, 2km from the concert, recorded a strong low frequency signal similar to a “volcanic tremor” during the gig, according to GeoNet.
The tremors began at 7:30pm during the Tenancious D set and peaked when the Foo Fighters came on at 8:20pm. The shaking then ended around 11pm.
According to GeoNet, the ground was shaking as a “semi continuous harmonic signal” at a peak oscillation of 3Hz - or three times per second.
This sort of shaking is usually associated with volcanic tremors as seen on White Island and Mt Ruapehu.
The shaking was a combination of the 50,000 fans jumping up and down in Western Springs Stadium and the bass-heavy sound system.
GeoNet says “man-made” tremors were also recorded during the Rugby World Cup.
3 News
