A touchdown run by Seattle Seahawks fans during an NFL playoff game produced enough seismic activity to be detected by seismologists across the Pacific Northwest.
Notes on verification
Well-documented 'Beast Quake' event confirmed by Wikipedia, ESPN, and PNSN's own blog. Detection was from a single nearby seismic station (KDK) near CenturyLink Field, not broadly 'across the Pacific Northwest' as the claim implies, so wording overstates the geographic scope slightly. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.825 clusters=2 claim_tier=notable]
Sources
- What Caused the California Earthquake? Faults Explained (seed:environment_and_wildlife)
- https://pnsn.org/blog/one-year-ago-seattle-seahawks-12th-man-earthquake (corroboration)
- https://www.espn.com/nfl/story/_/id/10064056/epic-run-marshawn-lynch-reverberates-seattle (corroboration)