Scientific consensus holds that a magnitude 10.0 earthquake is physically impossible on Earth because it would require an unrealistically long continuous fault rupture spanning much of the planet, far exceeding known subduction zones or tectonic boundaries. The largest recorded event remains the 9.5 Valdivia quake in Chile in 1960, with official USGS assessments confirming no fault system can generate magnitude 10 or higher. With only about 16 months until 2027, the near-term probability stays negligible absent unprecedented global seismic restructuring. Trader sentiment at 99.4% for "No" reflects this established geophysical limit, though rare model revisions or measurement anomalies could theoretically shift outcomes if new data emerged.