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The geomagnetic field varies in time and space, being a signal composed of periodic and non-periodic elements and is monitored in a tri-axial system within the geomagnetic observatories of the INTERMAGNET network across the planet. In the work, based on these data, we use for spectral evaluation (Fourier, wavelet, signal decompositions in approximations and details with various functions on different levels, etc.) in order to analyze different geomagnetic phenomena (such as: geomagnetic storms, disturbances, etc.)...

Geomagnetic disturbances and their associated phenomena can be an important parameter as data input in climatology studies and climate change. This paper is a preamble to a deliverable "Development of a catalog on the typology of geomagnetic variations based on records from the Surlari Geomagnetic Observatory" within the Space Weather project which is part of the complex multidisciplinary project „Institutional capacities and services for research, monitoring and forecasting of risks in extra-atmospheric space” wh...