With just 24 days remaining until September 30, 2026, market-implied odds for the maximum worldwide earthquake magnitude heavily favor continuation of the current pattern, where 2026 has produced eleven M7+ events but no M8.0 or greater. USGS records confirm the largest so far was M7.8 offshore the Philippines in June, with subsequent notable activity including an M7.7 in Indonesia during August; early September has featured only smaller events such as a shallow M5.3 near Mexico. Global seismicity follows the Gutenberg-Richter relation, with M8+ quakes averaging roughly one per year and M7–7.9 events occurring about 15–17 times annually, though short-term clustering or quiescence adds uncertainty. Continuous USGS monitoring and real-time catalogs provide the key upcoming data that could shift sentiment if a significant event registers before month-end.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHow strong of an earthquake will occur worldwide by September 30?
6.5+
99%
7.0+
59%
7.5+
31%
8.0+
10%
8.5+
3%
9.0+
1%
$9,518 Vol.
6.5+
99%
7.0+
59%
7.5+
31%
8.0+
10%
8.5+
3%
9.0+
1%
A qualifying earthquake must be listed by USGS with a preferred magnitude equal to or above the threshold listed in the option's title and listed as occurring within the specified timeframe. Earthquakes without a preferred magnitude classification will not qualify.
If an earthquake with an origin time within this market's window has not yet appeared on the resolution source by the end of the third calendar day after September 30, 2026 11:59:59 PM ET, this market end date may be extended for up to one week after September 30, 2026 11:59:59 PM ET and will resolve based on the first preferred magnitude and timestamp of the event in question. If the relevant data is not released by the end of the extension period, this market will resolve based on the data released up until that point.
Revisions to the underlying data, such as the preferred magnitude, will be considered until the end of the third calendar day after September 30, 2026 11:59:59 PM ET or until the end of an applicable extension period. Revisions made after the end of the third calendar day after September 30, 2026 11:59:59 PM ET or after the end of an applicable extension period will not be considered.
The resolution source for this event is the United States Geological Survey (USGS) Earthquake Hazards Program earthquake catalog (https://earthquake.usgs.gov/earthquakes/search/), and only data released by USGS will be considered, regardless of other sources. If the resolution source becomes temporarily unavailable, the market will remain open until it resumes; if it remains unavailable through the end of the third calendar day after September 30, 2026 11:59:59 PM ET, this market will resolve to "No."
Market Opened: Aug 17, 2026, 2:01 PM ET
Resolution Source
https://earthquake.usgs.gov/earthquakes/search/Resolver
0x65070BE91...A qualifying earthquake must be listed by USGS with a preferred magnitude equal to or above the threshold listed in the option's title and listed as occurring within the specified timeframe. Earthquakes without a preferred magnitude classification will not qualify.
If an earthquake with an origin time within this market's window has not yet appeared on the resolution source by the end of the third calendar day after September 30, 2026 11:59:59 PM ET, this market end date may be extended for up to one week after September 30, 2026 11:59:59 PM ET and will resolve based on the first preferred magnitude and timestamp of the event in question. If the relevant data is not released by the end of the extension period, this market will resolve based on the data released up until that point.
Revisions to the underlying data, such as the preferred magnitude, will be considered until the end of the third calendar day after September 30, 2026 11:59:59 PM ET or until the end of an applicable extension period. Revisions made after the end of the third calendar day after September 30, 2026 11:59:59 PM ET or after the end of an applicable extension period will not be considered.
The resolution source for this event is the United States Geological Survey (USGS) Earthquake Hazards Program earthquake catalog (https://earthquake.usgs.gov/earthquakes/search/), and only data released by USGS will be considered, regardless of other sources. If the resolution source becomes temporarily unavailable, the market will remain open until it resumes; if it remains unavailable through the end of the third calendar day after September 30, 2026 11:59:59 PM ET, this market will resolve to "No."
Resolution Source
https://earthquake.usgs.gov/earthquakes/search/Resolver
0x65070BE91...With just 24 days remaining until September 30, 2026, market-implied odds for the maximum worldwide earthquake magnitude heavily favor continuation of the current pattern, where 2026 has produced eleven M7+ events but no M8.0 or greater. USGS records confirm the largest so far was M7.8 offshore the Philippines in June, with subsequent notable activity including an M7.7 in Indonesia during August; early September has featured only smaller events such as a shallow M5.3 near Mexico. Global seismicity follows the Gutenberg-Richter relation, with M8+ quakes averaging roughly one per year and M7–7.9 events occurring about 15–17 times annually, though short-term clustering or quiescence adds uncertainty. Continuous USGS monitoring and real-time catalogs provide the key upcoming data that could shift sentiment if a significant event registers before month-end.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated


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