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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 35, issue 5
Ann. Geophys., 35, 1085–1092, 2017
https://doi.org/10.5194/angeo-35-1085-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: The Earth’s magnetic field: measurements, data, and applications...

Ann. Geophys., 35, 1085–1092, 2017
https://doi.org/10.5194/angeo-35-1085-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 12 Sep 2017

Regular paper | 12 Sep 2017

Bulgarian Geomagnetic Reference Field (BulGRF) for 2015.0 and secular variation prediction model up to 2020

Metodi Metodiev and Petya Trifonova

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Short summary
For regional studies and practical use regional-scale models of the geomagnetic field are necessary. The Bulgarian Geomagnetic Reference Field (BulGRF) for 2015.0 epoch and prediction up to 2020.0 is produced and presented in this paper. It uses data from Panagyurishte (PAG) observatory and the Bulgarian secular network. As a result, our model gives a set of six coefficients which allow the users to obtain the main field values using only the geographic coordinates and a simple calculator.
For regional studies and practical use regional-scale models of the geomagnetic field are...
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