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What will the biggest earthquake be on September 27, 2026?
Foretrace AI research
Understand the odds. Examine the reasoning.
Polymarket shows market prices. Foretrace adds AI probability estimates, opposing evidence and a price-dependent outcome or pass decision for each open market.
View a sample AI report No open markets in this event. Closed markets retain historical data.
24h volumeUnavailable
Total volume$1.4K
LiquidityUnavailable
Event end date · UTCSep 28, 2026
Price history
Market probabilityLoading price history…
Polymarket · UTC
Sampled market observations, not AI forecasts. Lines connect available observations. Legend values are current provider quotes; chart points may be older.
Outcomes & resolution rules
6 marketsThese are market-implied probabilities, not AI forecasts. A displayed quote may differ from the price available for your order.
Under 5.3ClosedMarket odds100%
Will the biggest earthquake on September 27, 2026 be under 5.3?
Yes100%Polymarket estimate
No0%Polymarket estimate
- Liquidity
- Unavailable
- Deadline · UTC
- Sep 28, 2026
- Yes bid / ask
- 99.9¢ / 100.0¢
- Trading fees
- Enabled · verify on Polymarket
Closed market · historical data
This market is closed. Its historical data remains available.
How research worksResolution rules
This market will resolve to the bracket containing the magnitude of the largest earthquake recorded globally on September 27, 2026, as reported by the USGS Earthquake Catalog. Brackets: Under 5.3 / 5.3 to 5.4 / 5.5 to 5.6 / 5.7 to 5.8 / 5.9 to 6.0 / 6.1 or more. Exactly one bracket resolves "Yes". The observation period is the UTC calendar day: 00:00 UTC to 23:59 UTC on September 27, 2026. An earthquake is assigned to the day containing its origin time. Magnitude refers to the USGS preferred magnitude value, listed under 'Magnitude' in the format column. If USGS revises a magnitude after initial publication, the revision governs provided it is published before 2:00 PM ET on September 28, 2026. A value first published after that time is not considered. If the reported magnitude carries more than one decimal place, it is rounded to the nearest tenth using standard rounding conventions (0.05 rounds up). Brackets are inclusive of their stated endpoints. If no earthquake data for September 27, 2026 has been published by 2:00 PM ET on September 28, 2026, this market will resolve to the "Under 5.3" bracket. The resolution source for this market is the USGS Earthquake Catalog, maintained by the United States Geological Survey, at https://earthquake.usgs.gov/earthquakes/search/.