The extreme rarity of magnitude 9.0+ earthquakes drives the 93.9% market-implied probability of none occurring before 2027. Only five such events have been recorded since 1900, with the most recent in 2011, and global estimates from USGS and paleoseismic records indicate one to three per century. With just over six months remaining, the short window aligns with this low baseline frequency across subduction zones. Current USGS monitoring reports no anomalous seismic activity or foreshock patterns suggesting an imminent megathrust rupture. While forecasts carry inherent uncertainty and a full-margin event in regions like Cascadia remains theoretically possible outside long recurrence intervals, the absence of recent precursors or elevated strain rates supports strong trader consensus on the "No" outcome.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated9.0 or above earthquake before 2027?
$226,110 Vol.
$226,110 Vol.
$226,110 Vol.
$226,110 Vol.
The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program (https://earthquake.usgs.gov/earthquakes/browse/significant.php#sigdef).
If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until January 31, 2027, 11:59 PM ET, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that date, another credible resolution source will be used.
After a qualifying earthquake is registered, this market will remain open for 24 hours to account for any revisions to its recorded magnitude. After 24 hours, this market will resolve according to the latest provided data.
Market Opened: Dec 8, 2025, 5:28 PM ET
Resolver
0x65070BE91...The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program (https://earthquake.usgs.gov/earthquakes/browse/significant.php#sigdef).
If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until January 31, 2027, 11:59 PM ET, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that date, another credible resolution source will be used.
After a qualifying earthquake is registered, this market will remain open for 24 hours to account for any revisions to its recorded magnitude. After 24 hours, this market will resolve according to the latest provided data.
Resolver
0x65070BE91...The extreme rarity of magnitude 9.0+ earthquakes drives the 93.9% market-implied probability of none occurring before 2027. Only five such events have been recorded since 1900, with the most recent in 2011, and global estimates from USGS and paleoseismic records indicate one to three per century. With just over six months remaining, the short window aligns with this low baseline frequency across subduction zones. Current USGS monitoring reports no anomalous seismic activity or foreshock patterns suggesting an imminent megathrust rupture. While forecasts carry inherent uncertainty and a full-margin event in regions like Cascadia remains theoretically possible outside long recurrence intervals, the absence of recent precursors or elevated strain rates supports strong trader consensus on the "No" outcome.
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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