**Trader consensus at 100% for a 5.3–5.4 magnitude event on October 1, 2026, rests on real-time global seismic networks confirming this as the day's maximum.** USGS and Japan Meteorological Agency records show the largest quake reached M5.3 near Yōkaichiba, Japan (depth ~42 km), with a separate M5.2–5.3 event in Afghanistan; no higher-magnitude events were detected worldwide that day. This aligns with typical daily global maxima, where M5+ events occur regularly but M6+ remain infrequent outside active sequences. Market-implied odds reflect verified catalog data rather than forecasts. A post-event magnitude revision upward by USGS or discovery of an unreported event in a remote region could theoretically alter resolution, though dense station coverage makes such shifts improbable.