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ECDO / Geophysics

Last checked: Aug 27, 2026, 11:10 PM EDT

This lane tracks official geomagnetic and Earth-orientation data and, separately, the ECDO hypothesis. The hypothesis is not proven science. Official figures and the hypothesis are never merged, and official data is not treated as confirmation of the hypothesis.

official data

Official data

Kp
NOAA SWPC Planetary K-index — live HUD. Not frozen on this page.
IERS
x = 0.212992″, y = 0.342431″ (Bulletin A final, 27 Aug 2026; arcseconds) finals2000A.daily
WMM
NOAA NCEI World Magnetic Model (WMM2025) — a navigation model, not a reversal forecast

Official Earth-orientation and geomagnetic products stay in this column. They are measurements and models, not confirmation of ECDO or of a pole reversal.

hypothesis

Hypothesis

ECDO (Exothermic Core-Mantle Decoupling / Dzhanibekov Oscillation)

Status: tracked hypothesis, not proven science

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.

official data

Chandler wobble

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.

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.

IERS Earth Orientation Centre polar-motion figure
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. IERS Earth Orientation Centre

Notes