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Open Access

An evaluation of candidate geomagnetic field models for IGRF 2000

Earth, Planets and Space201452:BF03352346

Received: 7 February 2000

Accepted: 15 June 2000

Published: 24 June 2014


A global evaluation is made of the four candidate models for IGRF 2000 (main field and secular variation) that were submitted to the IAGA Working Group V-8 by the deadline in February 1999. A description of the data used and the method of modelling is summarised for each candidate model. The models are then compared with one another and with recent data from observatories and magnetic surveys. It is concluded that none of the candidate main-field models is sufficiently good for an IGRF and that a new model should be derived using Ørsted data.


Candidate ModelSecular VariationRepeat StationMagnetic SurveyBritish Geological Survey