
Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
Market depth · 6.1 or more
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Related questions for context, not a comparison of equivalent contracts.
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Rules
This market will resolve to the bracket containing the magnitude of the largest earthquake recorded globally on October 20, 2026, as reported by the USGS Earthquake Catalog.
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/biggest-earthquake-2026-10-20AI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+5 more outcomes
+3 more outcomes
+1 more outcomes
+4 more outcomes