The Seattle Seahawks are a professional American football team based in Seattle, Washington. They compete in the National Football League as a member club of the league's National Football Conference West division. The Seahawks joined the NFL in 1976 as an expansion team. Currently coached by Pete Carroll, they have played their home games at CenturyLink Field in Seattle's SoDo neighborhood since 2002. They previously played home games in the Kingdome and Husky Stadium.
Seahawks fans have been referred to collectively as the "12th Man", "12th Fan", or "12s". The team's fans have twice set the Guinness World Record for the loudest crowd noise at a sporting event, first registering 136.6 decibels during a game against the San Francisco 49ers in September 2013, and later during a Monday Night Football game against the New Orleans Saints a few months later, with a then record-setting 137.6 dB. The Seahawks are the only NFL franchise based in the Pacific Northwest region of North America, and thus attract support from a wide geographical area, including some parts of Oregon, Montana, Idaho, and Alaska, as well as Canadian fans in British Columbia, Alberta and Saskatchewan.