FRACTAL PROPERTIES OF VARIATIONS IN THE COMPONENTS OF THE EARTH'S GEOMAGNETIC FIELD DURING EARTHQUAKES

Abstract

The fractal properties of the horizontal components of the geomagnetic field in the northern and eastern directions, the vertical component and the intensity of the geomagnetic field with a resolution of 1 sec, measured by various geomagnetic observatories of the INTERMAGNET network around the world during the period of major earthquakes in 2023, are analyzed. Magnetic field variations were analyzed during seismic events that occurred in different regions with a magnitude exceeding ~6. Fractal analysis methods are used to identify patterns and nonlinear relationships between changes in geomagnetic field components and manifestations of seismic activity. The dynamics of the fractal dimension of variations in the geomagnetic field components for days when a major earthquake occurred. The results obtained show a temporary change in the fractal dimension of the geomagnetic field components, revealing differences in their irregularity (complexity). The results show that strong earthquakes are accompanied by increased variations in the Earth's magnetic field.

Key words: fractal analysis, fractal dimension, self-similarity, time series, geomagnetic field; earthquakes.