Largest ground vibration caused by stereo systems

According to Official Guinness Records,

The largest ground vibration caused by stereo systems measured 6.985 mm/s at "Insane Sound World Record" organized by 101 Eventos (Brazil) at Parque do Peão in Barretos, São Paulo, Brazil, on 28 September 2014.

For a complete list of 2014 records, please visit 2014 Guinness Records in Brazil.

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