Testing Geomagnetic Reference Field models for 1990-2000 with data from the Trelew Geomagnetic Observatory, Argentina

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Published: Oct 1, 2003
DOI: https://doi.org/10.22201/igeof.00167169p.2003.42.4.317
Keywords:
IGRF secular variation Trelew observatory (Argentina)

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Julio C. Gianibelli
Departamento de Geomagnetismo, Facultad de Ciencias Astronómicas y Geofísicas, La Plata, Argentina
Jacqueline Köhn
Departamento de Geomagnetismo, Facultad de Ciencias Astronómicas y Geofísicas, La Plata, Argentina ; Instituto Antártico Argentino, Buenos Aires, Argentina
https://orcid.org/0000-0002-3731-1836
Marta E. Ghidella
Instituto Antártico Argentino, Buenos Aires, Argentina

Abstract

Every five years a new International Geomagnetic Reference Field (IGRF) model is released and the secular variation for the previous period is updated, producing the definitive DGRF model. Once a DGRF is released, the previously calculated magnetic anomalies are updated. We show the importance of this correction for the 1995-2000 period, in which the DGRF-IGRF difference is anomalously large. We document the validity of the correction by using data from the permanent geomagnetic Observatory of Trelew, Argentina.

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How to Cite
Gianibelli, J. C., Köhn, J., & Ghidella, M. E. (2003). Testing Geomagnetic Reference Field models for 1990-2000 with data from the Trelew Geomagnetic Observatory, Argentina. Geofisica Internacional, 42(4), 635–639. https://doi.org/10.22201/igeof.00167169p.2003.42.4.317
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Vol. 42 No. 4 (2003): October 1, 2003
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