Strong low frequency of tremors were detected at the time of the show, and correlated specifically with the highs and lows of the performance (see the graph on the left).
“The first vibrations were recorded around 7:30pm, part way through the Tenacious D set, but the biggest shakes started at 8:20pm when the Foo Fighters took the stage, and then it all went quiet at 11pm when the gig ended,” Geonet states.
“The concert vibrations were recorded as a semi-continuous harmonic signal with a peak osculation of 3Hz, i.e. the ground was shaking 3 times per second in a nice rhythmic motion. There are lulls in the signal between the songs and peaks in signal intensity during the songs.”
This just goes to show the kind of energy that comes from 50,000 fans. Is it any wonder that musicians can't get enough of it?
The Foos are also up for six Grammy Awards this year, including Album of the Year for Wasting Light, as well as best rock performance and best rock song for “Walk.” A little bit of that seismic energy would go nicely at the ceremony.
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