Largest ground vibration caused by car sound systems

According to Official Guinness Records,

The largest seismic earthquake caused by car stereos was caused by 22 cars which made the ground vibrate with a velocity of 6.325 mm/s. The event was organized by Fast Car Magazine and www.talkaudio.co.uk (all UK) at the Santa Pod Raceway, Northampton, UK, on 22 October 2008. The result is the equivalet of a 300 kg high explosive charge going off at a distance of 500 metres from the seismograph.

For a complete list of 2008 records, please visit 2008 Guinness Records in United Kingdom.

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