John Vidale, the director of the Pacific Northwest Seismic Network, said a seismic monitoring station located about 100 yards west of the stadium, registered seismic activity during the run.
"It was pretty striking how everyone was shaking," said Vidale, who wasn't at the game but watched a homemade video shot from the upper deck.
According to Vidale, the shaking was most intense in a 30-second stretch when Lynch broke free, scored the TD and celebrated in the end zone. It took about a minute for the shaking to completely die down.
It was the longest run of Lynch's four-year career.