Will the biggest earthquake on September 28, 2026 be under 5.3?
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Probability history
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Resolution rules
This market will resolve to the bracket containing the magnitude of the largest earthquake recorded globally on September 28, 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 28, 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 29, 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 28, 2026 has been published by 2:00 PM ET on September 29, 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/.
Sourcehttps://earthquake.usgs.gov/earthquakes/search/
Other legs of this event
A leg read alone is misleading; the others are beside it.| Market | Venue | Price | Status |
|---|---|---|---|
| Will the biggest earthquake on September 28, 2026 be 6.1 or more? | Polymarket | 100% No | Open |
| Will the biggest earthquake on September 28, 2026 be 5.3 to 5.4? | Polymarket | 100% Yes | Open |
| Will the biggest earthquake on September 28, 2026 be 5.7 to 5.8? | Polymarket | 100% No | Open |
| Will the biggest earthquake on September 28, 2026 be 5.9 to 6.0? | Polymarket | 100% No | Open |
| Will the biggest earthquake on September 28, 2026 be 5.5 to 5.6? | Polymarket | 99% No | Open |
Venue activity
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As of Sep 30, 01:14 AM UTC