Global seismic monitoring by the USGS recorded well over 13 earthquakes of magnitude 5.5 or greater during August 10–16, 2026, driving the market-implied odds above 99% for the >13 outcome. Key contributors included a M7.4 event in western Colombia on August 10 and a M7.7 offshore Indonesia shock on August 14, both along subduction zones, which typically generate aftershock sequences that elevate weekly counts. This exceeded the long-term background rate of roughly 8–10 such events per week derived from USGS catalogs, reflecting normal Poisson variability punctuated by clustered large-magnitude activity. Traders weighted confirmed catalog entries heavily, with resolution hinging on final USGS tallies through the exact seven-day window. An unexpected data revision or additional unreported events near the magnitude threshold could theoretically alter the final count, though current observational data make such shifts improbable.