DIGITAL DATA RECORDS IN PAG GEOMAGNETIC OBSERVATORY AVAILABLE FOR A 60 YEARS PERIOD

Bulgarian Geophysical Journal, 2019, Vol. 42, DOI: https://doi.org/10.34975/bgj-2019.42.5
P.Trifonova, M. Metodiev, I Buchvarov

Abstract:
Geomagnetic observatory data are used for investigation of internal Earth structure and processes occurring in the deep interior. In addition, long series of data allow extracting signals related to the Sun, Moon, Earth’s motion, etc. To obtain a 60-years long record of the hourly mean values of the geomagnetic field component a lot of efforts have been performed including scan of the old magnetic yearbooks, digitalization of the images and verification of data. As a result, geomagnetic database is created and made available through the institutional web-page and WDC Edinburgh providing basis for scientific research and analysis.

Keywords:
PAG observatory, geomagnetic records, secular variations, hourly mean values.

Acknowledgements:
The work presented in this paper is supported by the NATIONAL PROGRAM “Young scientists and postdoctoral fellows” of the Ministry of Education and Science of Bulgaria and the Bulgarian Academy of Sciences.

Author information:
Author: Petya Trifonova
E-mail: p.trifonova@abv.bg
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Metodi Metodiev
E-mail: m.i.metodiev@gmail.com
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Ivan Buchvarov
E-mail:
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

How to cite:
Trifonova, P., Metodiev, M., & Buchvarov, I. (2020). DIGITAL DATA RECORDS IN PAG GEOMAGNETIC OBSERVATORY AVAILABLE FOR A 60 YEARS PERIOD. Bulgarian Geophysical Journal, Vol. 42, p. 46-61. https://doi.org/10.34975/BGJ-2019.42.5