Seattle scientists predict crowd energy at Seahawks game could spark another 'Beast Quake' during playoffs against the 49ers.

The Seattle Seahawks have installed seismic sensors inside Lumen Field to measure fan-generated ground motion during the 2026 NFL playoffs. The Pacific Northwest Seismic Network (PNSN) set up six stations throughout the stadium to capture the seismic energy produced by the collective movement of the 12s, the Seahawks’ famously passionate fanbase.

The instruments are designed to capture energy produced by the collective movement of the 12s, the Seattle Seahawks’ well-known fan base, during Saturday’s playoff game.

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The Seattle Seahawks are once again teaming up with the Pacific Northwest Seismic Network (PNSN) to monitor how much the ground shakes when fans cheer during Saturday’s playoff game at Lumen Field.

It's the latest scientific study with a sports tie-in from the Pacific Northwest Seismic Network, which monitored earth shaking during the Mariners' playoff run last fall.

For years, the “12th Man” wasn’t just a marketing slogan; it was a physical force. It was the reason opponents racked up false start penalties like grocery store receipts and why the

Seattle Seahawks stunned the defending Super Bowl champions with a Marshawn Lynch touchdown run so violent it shook the stadium and entered NFL history.

The Seahawks will play their first home playoff game at Lumen Field since 2020 on Saturday against the 49ers and have a message for the fans: “We need our 12s out there. We need them as loud as ever.”

Peyton and Eli Manning surely knew what they were getting when they brought Marshawn Lynch on as a guest on Saturday night’s Manningcast. In their simulcast of the primetime NFL game between