What will the biggest earthquake be on November 4, 2026?
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The outcomes break “What will the biggest earthquake be on November 4, 2026?” into 6 separately evaluated possibilities.
The listed possibilities are 6.1 or more, 5.9 to 6.0, 5.7 to 5.8, 5.3 to 5.4, Under 5.3, and 5.5 to 5.6.
Each listed possibility follows the qualifying conditions, evidence source, and timing documented in the Resolution Rules below.
This market will resolve to the bracket containing the magnitude of the largest earthquake recorded globally on November 4, 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 November 4, 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 November 5, 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 November 4, 2026 has been published by 2:00 PM ET on November 5, 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/.