Six seismometers were installed at Lumen Field to measure fan-induced shaking during the Seahawks' 2026 playoff game against the 49ers.

Scientists from the Pacific Northwest Seismic Network and University of Washington have installed six seismometers at Lumen Field to measure ground shaking caused by Seahawks fans during their 2026 playoff game against the 49ers. The real-time data, available online and on social media, will capture crowd-induced seismic activity, continuing a tradition dating back to the 2011 "Beast Quake" when Marshawn Lynch’s touchdown triggered detectable vibrations. The effort, led by PNSN Director Harold Tobin, aims to highlight fan enthusiasm and regional seismic monitoring capabilities.