USGS data and fault mechanics establish firm physical limits preventing magnitude 10+ quakes, as no known fault segment is long enough to generate the required rupture length and energy release. The largest instrumentally recorded event reached only 9.5 in 1960 Chile on a roughly 1,000-mile subduction zone; theoretical maxima for any single fault fall well below 10. With just months remaining until 2027, the brief window further reduces any remote possibility. Trader consensus at 99.1% reflects this established seismological evidence rather than forecast uncertainty, though an unprecedented multi-fault cascade or major revision in magnitude scaling laws could theoretically alter outcomes.