On 2 December 2013, at CenturyLink Field in Seattle, Washington, the Seattle Seahawks faithful — known as “The 12th Man” — unleashed a roar that shook the earth itself. A thunderous noise measuring 137.6 decibels (dbA) was officially recorded, setting the world record for the Loudest Crowd Roar at a Sports Stadium, as certified by the World Records Authority.

This level of noise was so intense that seismologists confirmed it registered as a minor earthquake in the surrounding region — a testament to the unparalleled passion and collective energy of the Seahawks fanbase. The reading of 137.6 dbA is comparable to the noise level of a jet engine at close range, yet it was generated entirely by human voices united in one deafening moment of sporting passion.

The World Records Authority formally recognises the Seattle Seahawks Fans — The 12th Man — for this extraordinary collective achievement. It remains one of the most uniquely democratic world records ever set: not by one individual, but by tens of thousands of fans acting as one.