SRC-122

IGRF-14 magnetic dip angle (inclination) at UK, Chilton, Sondrestrom, Millstone Hill and Huancayo, ground and 250 km, epoch 2026.5, full spherical harmonic field and degree-1-only

IGRF-14 via ppigrf 2.1.0 (Laundal), coefficient file IGRF14.shc; run locally and independently re-derived ·2026-09-02 · T1 measured result, peer reviewed · VC06

Published claims resting on this source

CLM-0118 (low confidence) Storms big enough to disturb the ionosphere over the UK happen on roughly 12 to 18 days a year on average, mostly around solar maximum. Which figure is right is not yet known.
CLM-0400 Millstone Hill sits at almost exactly the UK's magnetic dip angle, and the UK's modelled density range fits entirely inside what Millstone Hill measured. So Millstone Hill data can be used for the UK without extrapolating across latitude, though it is not a UK measurement.

Cite this

energyaperture.com/s/src-122

SRC-122 , recorded 2026-09-02.