The 86.5% market-implied probability for No reflects trader consensus on the low short-term likelihood of a magnitude 8.0 or greater earthquake worldwide before June 30, aligned with USGS historical data showing roughly one such great earthquake annually, prorated to about 14% odds over the remaining seven weeks. No M8+ events have occurred in 2026 to date, despite several M7+ quakes including the April 20 M7.4 subduction zone event off northern Japan, which briefly elevated Nankai Trough megaquake risk to 1% for one week per Japan Meteorological Agency advisories—now lapsed without escalation. Current USGS global monitoring reveals typical seismic rates absent anomalous strain buildup or foreshock patterns on major faults like Cascadia or Sumatra. Traders await real-time updates from seismic networks, with inherent forecasting uncertainty underscoring the wisdom-of-crowds baseline assessment.