International Geomagnetic Reference Field: the thirteenth generation

Abstract

In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted the thirteenth generation of the International Geomagnetic Reference Field (IGRF). This IGRF updates the previous generation with a definitive main field model for epoch 2015.0, a main field model for epoch 2020.0, and a predictive linear secular variation for 2020.0 to 2025.0. This letter provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020.0 to 2025.0 time period.

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Authors/Creators:

Copyright, Publisher and Additional Information:

© The Author(s) 2021. This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/)

Keywords:

IGRF; magnetic field modelling; geomagnetism

Dates:

Accepted: 3 October 2020
Published (online): 11 February 2021
Published: 11 February 2021

Institution:

The University of Leeds

Academic Units:

The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds)

Funding Information:

Funder	Grant number
NERC (Natural Environment Research Council)	NE/G014043/1

Depositing User:

Symplectic Publications

Date Deposited:

11 Sep 2020 14:05

Last Modified:

14 Apr 2021 11:04

Status:

Published

Publisher:

SpringerOpen

Identification Number:

https://doi.org/10.1186/s40623-020-01288-x

Related URLs:

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