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Nonlinear Analysis of Geomagnetic Variations Data from Panagyuriste Geomagnetic Observatory, Bulgaria
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 10th Congress of the Balkan Geophysical Society, Sep 2019, Volume 2019, p.1 - 5
Abstract
We apply the detrended fluctuation analysis (DFA) to the geomagnetic field data set collected from 14 till 31 May 2016 by the equipment at Panagyuriste Observatory, Bulgaria and calculate DFA exponent and its temporal evolution in different time scales (10-180 s, 10-900 s). Performing this analysis we obtain useful information about long range correlations of time series and about the global and the local variations of the geomagnetic field in the ULF range. It is found that an unusual behavior of the DFA exponent is observed only for the vertical (Z) geomagnetic component on 19.05.2016. We assume that this unusual behaviors of the scaling exponent and the fluctuation function in time scale 10-900 s may be due to lithospheric source.