Microseismic Background in the Conditions of the Yangibazar Observatory

Abstract The annual dynamics of the microseismic background recorded in 2024–2025 at the Yangibazar Geophysical Research Observatory were analyzed. Spectral (Fourier, PSD) and cross-correlation analyses were performed using data from the Güralp CMG-6TD digital seismometer. Variations of the microseismic background were compared with geomagnetic storms, groundwater level changes, magnetic anomalies, electrotelluric field variations, and electromagnetic impulses. The results demonstrate the sensitivity of the microseismic background to both internal and external geophysical factors. During strong magnetic storms, amplitude increased by 10–15%, and during groundwater level rise, energy increased in the 2–4 Hz range. The importance of integrated geophysical monitoring for seismic assessment is substantiated.

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