Global seismicity follows a stable long-term rate of roughly one magnitude 6.5 or greater earthquake every eight days on average, or about 0.9 events per week, producing market-implied odds closely aligned with a Poisson distribution centered on zero or one event. USGS and international catalogs show 2026 activity running slightly below the annual mean of approximately 46 such quakes, with recent August events including M7.7 and M7.4 shocks now followed by background levels and no evident clustering or aftershock sequences elevating near-term probability. Traders therefore weight the absence of active subduction-zone swarms or foreshock indicators most heavily, while recognizing that isolated events remain possible anywhere along major plate boundaries within the seven-day window.