An interception and 90-yard touchdown by Kam Chancellor was the biggest play of the Seahawks' playoff victory judging from seismic equipment that monitored the shaking at CenturyLink Field.

A Richard Sherman interception and Marshawn Lynch run on Saturday also jogged the needles on the Pacific Northwest Seismic Network.

Spokesman Bill Steele at the University of Washington says the monitoring worked well but so many people checked the website that they had to refresh a couple times to get in.

Steele says officials will try to make the website more reliable as they monitor this weekend's game.

Scientists are using the stadium monitors to look for problems they might encounter with a real earthquake. They're also testing technology that could provide an early warning of underground shaking.