Seahawks fans jumping up and down during Monday night’s 22-yard Michael Bennett fumble return for a touchdown registered about a magnitude 1 or 2 earthquake.
They call the crowd at CentiryLink Field the "12th Man," but this is the first time that man has caused an earthquake that anybody knows of. People aren't generally sensitive enough to feel earthquakes that small; seismographs are. (For comparison, a 2.6 magnitude quake in Ireland this week rattled some doors.)
What people are sensitive to, though, is noise. Seattle has long been proud of their stadium and fans ability to be loud. And not only did Seattle fans make the earth shake, they also made each other deaf. Fans apparently set a noise record of 137.6 decibels, according to KIRO-TV.
More from Smithsonian.com: