ANNUAL REPORT OF THE OBSERVED GEOMAGNETIC ACTIVITY IN PANAGJURISHTE OBSERVATORY FOR 2015

Bulgarian Geophysical Journal, 2020, Vol. 43, DOI: https://doi.org/10.34975/BGJ-2020.43.4
Metodi Metodiev, Petya Trifonova

Abstract:
Presently, in the era of Internet communication the preliminary time series (INTERMAGNET’s reported data) acquired in geomagnetic observatories are available in near-real time, while the final absolute time series (definitive data) are disseminated with many months delay, being subject to many checks. This paper reports the definitive geomagnetic data obtained in Panagjurishte observatory in 2015, prepared in the form of local geomagnetic indices and absolute time-series of daily mean values plots. Calculated indices show that 2015 has quite disturbed geomagnetic field reaching K=8. This is reasonable due to the fact that it is in the middle of the 24th So;ar cycle when the Sun is in its most active period. Verification of data quality is performed according to “IAGA guide for magnetic measurements and observatory practice”.

Keywords:
PAG observatory, geomagnetic variations, geomagnetic activity, local geomagnetic indices, daily mean values, 2015

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

How to cite:
Metodiev, M., & Trifonova, P. (2020). Annual report of the observed geomagnetic activity in Panagjurishte observatory for 2015. Bulgarian Geophysical Journal, Vol. 43, p. 43-58. https://doi.org/10.34975/BGJ-2020.43.4