Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news gdelt_news wikipedia code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a pure base-rate counting question: the number of M7.0+ quakes worldwide in 2026, with the 11-13 bucket. USGS long-term average is ~15/yr, so a Poisson/negative-binomial fit to the last ~25 years of annual counts is the core of the estimate, adjusted for how much of 2026 has already elapsed and how many M7+ events have already occurred. Market prices across the full set of Polymarket buckets (and any Kalshi analog) give the consensus anchor and let me check the implied distribution for coherence.

# Current state As of mid-August 2026 (~62% of the year elapsed), approximately 10–11 earthquakes of M7.0+ have been recorded worldwide per USGS-sourced news reporting, most recently a M7.7 in Indonesia on Aug 15. The question resolves YES only if the FULL-YEAR 2026 total lands in [11,13]; extrapolating current pace (~11 by day 228) implies a full-year total nearer 16–18, above the target bucket. # Timeline of key events - 2026-02-22: First M7.0+ of year, near Malaysia region (reported, Wikipedia/news aggregation). - 2026-03: M7+ events near Tonga and Vanuatu (reported). - 2026-04: M7+ events in Indonesia and Japan (reported). - 2026-06-07: M7.8 Philippines — strongest 2026 event to date (reported). - 2026-06 (two events): M7+ Venezuela earthquakes (reported). - 2026-07-17: M7.3 near Puerto Madero, Mexico, tsunami warning issued (confirmed, Newsweek/AOL). - 2026-07-28/29: M7.1 southern Japan, mall collapse (confirmed, multiple outlets). - 2026-08-10: M7.4 Colombia — 10th M7+ of year per USGS-sourced count (reported, The Star/Insider Paper). - 2026-08-15: M7.7 Indonesia, ~38–47 deaths, likely 11th M7+ event of year (confirmed, SMH/CBC/KCRA); a subsequent 6.9 aftershock (Aug 16) does NOT count (below 7.0 threshold). # Event Will the worldwide count of USGS-recorded M7.0+ earthquakes in 2026 (Jan 1–Dec 31) fall between 11 and 13 inclusive? # Outcomes to forecast - Yes (final 2026 count in [11,13]) - No (final count <11 or >13) # Kalshi market anchor No kalshi_direct data was returned in research (gap). The only direct market price available is from Polymarket on the identical ticker/question: current YES price **9.5%**, down from a high of 36% (90-day range 9.5%–36%), 7-day change -8.5%, 30-day change -7.0%, volume $415,699. The consistent downward trend reflects the 2026 pace outrunning the 11–13 band as the year progresses. # Sub-question answers 1. **Polymarket price for 11–13 bucket and siblings** — 11–13 bucket priced at 9.5% (falling). Per claude_news, sibling buckets on the same Polymarket event show "14–16" leading at 42% and "17–19" at 36%, implying the market believes actual pace is running above the 11–13 band. 2. **Empirical annual M7.0+ counts 2000–2025** — Mean 13.85/yr, variance 14.94 (dispersion ratio ~1.08, near-Poisson). Count fell in [11,13] in 6 of 26 years (23.1%): 2002, 2008, 2014, 2022, 2024, 2025. [code_execution] 3. **2026 count to date** — ~10–11 M7.0+ quakes through Aug 15–16, 2026 (news/USGS-sourced), with ~4.5 months (38%) of the year remaining. Wikipedia's running tally (5) appears stale/lagging vs. news reports (10-11). [claude_news, gdelt_news] 4. **Resolution source discrepancies** — Not directly tested; USGS "significant earthquakes" page vs. full ComCat catalog could differ, and magnitude revisions (6.9↔7.0 borderline events, e.g., Indonesia's Aug 16 aftershock listed at 6.9) are a plausible source of count uncertainty, but no explicit systematic bias was found in research. 5. **Model-based P(11-13)** — Poisson(λ=13.85): 29.5%; Negative Binomial (MoM/MLE): 28.8–29.1%. Unconditional baseline ≈29%, above raw empirical 23%. Conditional on ~10-11 observed by day ~228 (f≈0.62, outside the provided table's f≤0.2 range), pace implies annualized total ~16-18, pushing P(11-13) well below the unconditional baseline — likely into single-to-low-double-digit percent territory by extrapolation of the table's trend (higher observed k at low f sharply cuts P(11-13)). [code_execution] 6. **Other prediction-market analogs** — No other Kalshi earthquake-count markets found (only unrelated single-large-quake markets for CA/Japan). Polymarket sibling buckets (14–16 at 42%, 17–19 at 36%) imply a distribution shifted well above 11–13. [kalshi_related, claude_news] # Key facts (high-confidence, factual) 1. [code_execution] 2000–2025 mean 13.85/yr, var 14.94; 6/26 years in [11,13]. 2. [claude_news/gdelt_news] ~10-11 M7.0+ quakes recorded 2026 through Aug 15-16. 3. [polymarket_direct] Current Polymarket YES price for 11-13 bucket: 9.5%, down from 36% high. 4. [claude_news] USGS long-run baseline ~16 major quakes/yr (15 in M7-range + 1 M8+). # Cross-market signals - Kalshi related: No direct 2026-count market found; only unrelated single-quake threshold markets (CA M8+ by 2035/2028, Japan M8+ by 2030) — not directly comparable. - Polymarket: 11-13 bucket at 9.5% (falling); sibling buckets 14-16 (42%) and 17-19 (36%) dominate, implying market consensus final count likely >13. - Sportsbook implied: N/A. # Analyst opinions and speculation - [claude_news] Market commentary states 2026 seismic activity "tracking close to baseline rates without pronounced clustering," yet bucket pricing still favors 14-16 over 11-13, suggesting modelers expect pace to continue at or slightly above historical average. # Directional lean per outcome - **Yes (11-13)**: Supported by baseline Poisson/NB models (~29% unconditional) and historical frequency (23%); opposed by current pace (~10-11 by 62% of year, extrapolating to ~16-18) and Polymarket pricing (9.5%, falling, with heavier weight on 14-16/17-19). - **No**: Supported by observed 2026 pace exceeding average trajectory, Polymarket's own distribution favoring higher buckets, and consistent downward price trend for this bucket. # Gaps / unknowns - No Kalshi-direct price was available in this research pass — anchor uses Polymarket price on the same question as a proxy; true Kalshi YES price could differ. - No precise current-day M7+ tally beyond Aug 15-16; possible under/over-count due to lag in resolution source updates or magnitude revisions. - Conditional probability table only covers f≤0.20; extrapolation to f≈0.62 with k≈10-11 is inferred, not directly modeled. # Calibration anchors - Polymarket current YES price (proxy anchor): 9.5%, trending down. - Historical base rate: 23.1% (6/26 years) landed in [11,13]; Poisson/NB smoothed estimate ~29%. - Current-year pace (10-11 by day ~228) implies annualized ~16-18, below Polymarket's leading 14-16 bucket's midpoint but above the 11-13 band — suggesting fair value likely below 29% prior, roughly consistent with market's ~9.5%.

1. Both forecasts converge to nearly identical outputs (0.11 vs 0.12) that hug the Polymarket anchor almost exactly, suggesting anchoring on the market price rather than independently propagating their own Poisson/NB math — the brief's own conditional-probability table only covers f≤0.20 and explicitly says extrapolation to f≈0.62 is "inferred, not directly modeled," yet neither forecaster widens their uncertainty band to reflect this extrapolation risk. 2. Neither forecaster flags the Kalshi/Polymarket substitution risk clearly: the brief states "No Kalshi-direct price was available... true Kalshi YES price could differ," but both treat the Polymarket 9.5% as if it were the Kalshi price itself rather than a proxy with unknown basis risk (different liquidity, resolution source, or settlement nuances). 3. Both treat "No" as effectively synonymous with "count exceeds 13," but neither explicitly quantifies or dismisses the tail scenario of the count falling below 11 — worth noting even briefly, since a sudden 4.5-month lull is not impossible given seismic quiescence periods, and ignoring it slightly overstates confidence in the "high pace continues" story. 4. Neither model addresses the clustering evidence in the timeline (e.g., two Venezuela M7+ events in June, back-to-back Puerto Madero/Japan events in July) that pushes 2026's dispersion above the historical ~1.08 ratio — clustering implies the Poisson iid assumption underlying both calculations likely understates variance, which could modestly raise P(11-13) if the recent cluster resolves back toward baseline pace rather than persisting. 5. The brief notes plausible double-sided magnitude-revision uncertainty (the Aug 16 Indonesia aftershock listed at 6.9, borderline to 7.0), but both forecasters mention this only as a reason "favoring No" via undercounting — they should acknowledge revisions could also add borderline events upward, making this uncertainty symmetric rather than one-directional. 6. Confidence levels (0.72 and 0.64) seem too high given the stated gaps (stale Wikipedia tally vs. news count discrepancy, extrapolation beyond the modeled f≤0.20 range, and no confirmed Kalshi-specific price), which collectively suggest a wider plausible range (perhaps 5-20%) rather than tight convergence near 10-12%.

12% (68% confidence)

Yes: 12% No: 88%

With ~10–11 M7.0+ events already logged by mid-August (62% of the year elapsed) and a baseline expectation of ~5–6 further events in the remaining 4.5 months, the year needs an unusually quiet finish to land in [11,13]: a Poisson calculation gives ~9% if the current tally is 11 and ~20% if it is 10, blending to roughly 12–14%. The Polymarket proxy anchor (9.5%, falling, with 14–16 at 42% and 17–19 at 36%) is consistent with this pace-based view. I sit modestly above the market anchor to respect the critique's points: the tally is uncertain (10 vs 11), magnitude revisions cut both ways, clustering in the observed timeline suggests over-dispersion (which fattens the low-count tail as well as the high), and the sub-11 tail is not strictly zero. Unconditional base rates (23–29%) are largely superseded now that most of the year is observed above trend, so the final call stays clearly on No while widening slightly toward Yes versus the raw market price.

Total pipeline time: 291.3s