Global seismic records from the USGS indicate roughly 120–150 magnitude 6–6.9 earthquakes annually alongside 15–20 magnitude 7+ events, yielding an average of about 2–3 magnitude 6.5+ quakes per week under a roughly Poisson distribution. This statistical baseline positions zero or one event as the most probable outcomes for any seven-day window, consistent with the market’s 46.5 % and 31.5 % implied probabilities. Recent activity through early June 2026 shows typical background rates with isolated magnitude 6.0–6.6 events but no ongoing aftershock sequences or swarm activity likely to elevate counts. Absent short-term precursors detectable by current monitoring networks, traders assign low odds to three or more events, reflecting both climatological norms and the absence of anomalous strain release signals.