How many 6.5 or above earthquakes August 3 - August 9?

Platform comparison

Market context

An earthquake count of **6.5 or above** for the 3–9 August window is already close to the normal level of scrutiny the USGS applies to notable global events, but the live pricing at **96% YES** implies traders think at least one qualifying shock is highly likely to appear in the final USGS tally. That sits comfortably above the broader market for mid-6 magnitude quakes, which are common enough to recur several times a month worldwide, but still rare enough that a one-week window can be sensitive to a single late revision or newly posted event. Recent catalogue entries on the USGS world M6+ pages and ETH Zurich’s 90-day list show multiple 6.1–6.3 events in early August and a 6.8 near Kyushu on 28 July, underlining that the plate boundaries most likely to deliver a 6.5+ event remain active heading into the settlement window.[8][9]

For comparison, the main historical framing point is that weeks with no 6.5+ earthquakes do happen, but they are less common than weeks with at least one event when global seismicity is elevated; the crowd-implied **96% YES** leaves little gap for scepticism unless one expects the USGS list to remain unchanged. I do not see a quoted sportsbook line in the supplied sources, so the useful cross-platform comparison here is between the prediction market and analyst-style seismic monitoring rather than a direct bookmaker spread; those monitoring feeds are broadly consistent with ongoing worldwide activity, though the most recent public summary cited in the search results still showed no magnitude-6 or higher quakes in the prior 24 hours, which only matters if it persists through the end of the market window.[7][12]

The key catalyst is not an announcement schedule but **USGS catalogue updates**: late-arriving automatic solutions, magnitude revisions, and event merges can all change whether a quake qualifies under the 6.5 threshold. Traders should watch the USGS search and map feeds through the settlement cut-off, because the market resolves on the official list rather than on media reports, and recent major-quake coverage in Mexico shows how preliminary magnitudes can shift quickly before settling on a final USGS value.[6][12][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track How many 6.5 or above earthquakes August 3 - August 9? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.