Global seismicity data from the USGS indicate roughly 46 magnitude 6.5+ earthquakes occur worldwide annually, or about 0.9 per week on average, though events follow a clustered rather than uniform distribution. As of late August 2026, the year-to-date total remains slightly below the long-term trend, with recent monitoring showing no events above 6.0 in the preceding days and primarily lower-magnitude activity along major plate boundaries. These patterns, combined with the absence of notable foreshock sequences or volcanic unrest, underpin the close market-implied odds favoring zero or one event during August 31–September 6. USGS catalog updates through the week will resolve outcomes based on confirmed moment magnitudes, with any sudden swarm or aftershock sequence capable of shifting probabilities.