Re: Real utility
The AC/DC concert in Auckland last year was picked up on the seismographs.
http://www.stuff.co.nz/entertainment/75152808/acdc-concert-receives-27-noise-complaints-makes-earth-shudder
The AC/DC concert in Auckland last year was picked up on the seismographs.
http://www.stuff.co.nz/entertainment/75152808/acdc-concert-receives-27-noise-complaints-makes-earth-shudder