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Events
GroupKALSHI
Event GroupKALSHIClimate and Weather
Will there be an at least 8.0 magnitude earthquake in California before 2035?
Total Volume
$17.69K
Events
1
Markets
1
Will there be an at least 8.0 magnitude earthquake in California before 2035?
Platform StatsQuick Platform Comparison
Polymarket
0
markets · $0.00
Kalshi
1
markets · $17.69K
Price Spread
0.0%avg
max 0.0%
Arbitrage
0
of 0 cross-platform
Volume DistributionTotal: $17.69K
100%
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Price ChartMatched Markets Price Graph
1 market tracked
Will there be an at least 8.0 magnitude earthquake in California before 2035?
No data available
Single-Platform Markets(1)
| Market | Platform | Price |
|---|---|---|
Will there be an at least 8.0 magnitude earthquake in California before 2035? | Kalshi | 20% |
AI Analysis
Trader mode: Actionable analysis for identifying opportunities and edge
20%
Top Probability
$17.69K
Volume
1
Markets
1
Platforms
About This Event
Before 2035 If there is at least an earthquake of 8.0 magnitude with an epicenter in California or its territorial waters before Dec 31, 2035, then the market resolves to Yes. Early close condition: This market will close and expire early if the event occurs. This market will close and expire early if the event occurs.
What Prediction Markets Are Forecasting
Prediction markets currently estimate about a 1 in 5 chance that California will experience an earthquake of magnitude 8.0 or greater before the end of 2035. This means traders collectively view such a major seismic event as unlikely within this timeframe, but not impossible. The low probability reflects a significant consensus, though it still leaves room for serious concern given the potential impact.
Why the Market Sees It This Way
The low probability is based on a few key factors. First, earthquakes of this size are extremely rare. The last one in California was the 1906 San Francisco earthquake, estimated at magnitude 7.9. The state has not recorded an 8.0+ quake in modern history. Second, while the San Andreas and other fault systems are capable of generating such an event, the statistical recurrence intervals for the most powerful segments are often measured in centuries. Third, the market may be weighing the constant background risk against the relatively short 12-year window. A 20% chance by 2035 is actually a fairly high annualized risk in geological terms, but the long quiet period since the last mega-quake influences the near-term forecast.
Key Dates and Events to Watch
There are no specific dates for earthquakes. Instead, the market will react to major seismic activity or new scientific assessments. A large foreshock sequence, say a magnitude 7.0+ event on a major fault, would likely cause the probability to spike. Updates from the U.S. Geological Survey, especially to their official earthquake forecasts like the Third Uniform California Earthquake Rupture Forecast, could also shift predictions if they significantly change the calculated odds for a great quake. Continuous seismic monitoring is the only real timeline.
How Reliable Are These Predictions?
Prediction markets are generally effective at aggregating known scientific and public information. For this type of low-probability, high-impact geophysical event, their track record is mixed. They efficiently incorporate published seismic hazard models, but they cannot predict the exact timing of a random geological process. The 20% estimate is likely a reasonable reflection of current official seismic hazard assessments, which also assign a low but non-zero probability to this scenario in the coming decades. The main limitation is that all forecasts, market-based or scientific, are ultimately dealing with deep uncertainty about the earth's complex systems.
Current Market Outlook
The prediction market on Kalshi prices a roughly 20% probability that a magnitude 8.0 or greater earthquake will strike California before the end of 2035. This price, equivalent to 20 cents on a yes-share, indicates the market views such a catastrophic seismic event as a significant, but relatively low-likelihood, tail risk over the next decade. With only about $18,000 in total trading volume, liquidity is thin. This suggests the current odds are more indicative of a baseline consensus than a heavily traded view, and they could shift with new scientific information or major seismic activity.
Key Factors Driving the Odds
This 20% probability directly reflects established geological hazard models. The U.S. Geological Survey's Uniform California Earthquake Rupture Forecast estimates about a 7% probability of a magnitude 8.0 or larger quake occurring somewhere in California over a 30-year period. The market's ~20% probability for an 11-year window is therefore notably higher than a simple linear extrapolation of that 30-year forecast. Traders are likely pricing in the heightened risk concentrated on specific faults, particularly the southern San Andreas. Historical precedent also informs this price. The last event of this scale in California was the 1857 Fort Tejon earthquake, estimated at magnitude 7.9. The absence of a magnitude 8.0 in the modern instrumental record makes it a low-frequency, high-consequence event.
What Could Change These Odds
The odds will remain relatively stable barring new data, but they are sensitive to two primary catalysts. First, a major seismic event below the 8.0 threshold, especially on the southern San Andreas or Cascadia subduction zone, could cause a sharp, temporary spike in the yes-probability as traders reassess regional stress and the potential for a follow-on event. Second, peer-reviewed publication of new research that materially revises official seismic hazard forecasts, such as a study suggesting a shorter recurrence interval for great earthquakes, would provide a fundamental reason for the market to reprice. The quiet but steady accumulation of strain along major fault lines is the constant background driver; the market will only move when that process becomes measurable or violently apparent.
AI-generated analysis based on market data. Not financial advice.
