{
  "stale": false,
  "last_checked": "Aug 27, 2026, 11:10 PM EDT",
  "official": {
    "kp": "NOAA SWPC Planetary K-index — live product (see HUD / SWPC). Not frozen here.",
    "kp_url": "https://www.swpc.noaa.gov/products/planetary-k-index",
    "iers": "x = 0.212992″, y = 0.342431″ (Bulletin A final, 27 Aug 2026; arcseconds)",
    "iers_url": "https://datacenter.iers.org/products/eop/rapid/daily/finals2000A.daily",
    "wmm": "NOAA NCEI World Magnetic Model (WMM2025) — a navigation model, not a reversal forecast",
    "wmm_url": "https://www.ncei.noaa.gov/products/world-magnetic-model",
    "note": "Official Earth-orientation and geomagnetic products stay in this column. They are measurements and models, not confirmation of ECDO or of a pole reversal.",
    "chandler_what": "Chandler wobble is a free wobble of Earth’s rotation axis relative to the crust. The IERS Earth Orientation Centre describes it as a free oscillation with a period of about 435 days. IERS’s useful-constants table lists the Chandler period in the terrestrial frame as 433.1 ± 1.7 mean solar days. Polar motion — the daily x and y IERS publishes — is the measured combination of Chandler wobble, an annual wobble, and other terms. This site does not invent an amplitude.",
    "chandler_snapshot": "IERS Rapid Service / Prediction Centre finals2000A.daily (IAU2000A), Bulletin A final values for 27 Aug 2026 (MJD 61279): x-pole 0.212992 arcseconds (±0.000091), y-pole 0.342431 arcseconds (±0.000091). Product file last modified 27 Aug 2026, 1:15 PM EDT. Units are arcseconds, as published.",
    "chandler_figure_url": "https://hpiers.obspm.fr/eop-pc/WEBFTP/graphes/img_PM_9010.png",
    "chandler_figure_caption": "IERS Earth Orientation Centre Figure 1: polar motion since 2006 (Chandler wobble plus annual), with a 180-day prediction in yellow. Official IERS illustration of the motion — not a Doom Signals plot, not a reversal forecast, and not a substitute for the dated x/y snapshot.",
    "chandler_figure_source_url": "https://hpiers.obspm.fr/eop-pc/index.php?index=pm&lang=en"
  },
  "hypothesis": {
    "name": "ECDO (Exothermic Core-Mantle Decoupling / Dzhanibekov Oscillation)",
    "status": "tracked hypothesis, not proven science",
    "notes": "Some ECDO and pole-reversal discussions cite Chandler wobble and polar motion. Official IERS x-pole and y-pole values are Earth-orientation measurements: where the rotation axis sits relative to the crust. They are not confirmation of a geomagnetic reversal, a crustal flip, or ECDO. This column stays separate from the official-data column."
  }
}