Seahawks fans have been referred to collectively as the “12th Man”, “12th Fan”, or “12s”. The Seahawks’ 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.