I heard about this on the news this morning...
Seahawks 12th Man Creates Measurable Seismic Tremor?
Pacific Northwest Seismic Network Records Tremor as Marshawn Lynch Runs for TD
(For those of us who don't know the jargon, the "12th man" is the fans as a whole, and TD is touchdown.)
Q13 FOX News Online
9:37 p.m. PST, January 9, 2011
With every yard Seahawks running back Marshawn Lynch gained, Qwest Field got louder.
But by the time his 67-yard, eight tackle breaking scamper in Saturday's playoff game against the New Orleans Saints was over, the 12th man was rocking.
And apparently so was the earth below the stadium.
The Pacific Northwest Seismic Network recorded a small tremor at exactly 4:43 p.m. Saturday afternoon from an old monitoring system near where the Kingdome used to stand.
That time is almost exactly when Lynch broke what turned out to be the game-deciding touchdown run in the 4th quarter, sealing the improbably win by the Seahawks.
And while Qwest Field is famous nationwide for it's crowd noise, PNSN scientists think their readings show that was the first recorded 12th man tremor, ever.
After all, the "quake" was recorded only at that single SoDo station.