This paper presents the results of radioastronomical and magnetometric observations of the partial solar eclipse of 29 March 2025, conducted under conditions of low solar and geomagnetic activity in the day of the eclipse. Using the low-frequency radio telescopes URAN-4 in Ukraine and LOFAR stations in Latvia and Germany, as well as a network of geomagnetic observatories in Ukraine and in Eastern and Northern Europe, we investigated the ionospheric and geomagnetic response to the passage of the lunar penumbra. Enlargements of ionospheric scintillations and irregular fast geomagnetic variations were detected in the period range from tens of seconds to several minutes, with spatial and temporal correspondence to the eclipse interval. Analysis of time delays and the frequency dependence of the effects indicate the generation and propagation of acoustic-gravity waves and associated traveling ionospheric disturbances induced by the sharp gradient of solar radiation in the penumbral region. It was found that bursts of irregular geomagnetic pulsations were active during the eclipse and decayed rapidly after it ended, with the pulsation amplitudes being larger at Ukrainian stations (penumbral edge) than at stations in Canada and Great Britain. The results demonstrate that even a partial solar eclipse can produce a multi-level response of the geospace environment, extending thousands of kilometres from the region of maximum phase. Keywords: solar eclipse, geomagnetic variations, space weather, ionospheric scintillations.
Sukharev et al. (Thu,) studied this question.