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Table 2 The rms differences between models of different epochs and Model 1 and Model 2

From: Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13)

 

Main field

Secular variation

M1 2017

M2 2017

M1 2017

M2 2017

2020

271.41

863.49

21.00

22.11

2025

306.11

1511.43

34.70

40.79

2030

306.54

359.97

35.13

90.02

  1. Differences of main field models are given in \([\text{nT}]\) and differences of secular variation models are in \([\text{nT/year}]\)