Summary
Relatively good correlation between such remote phenomena as microseisms, geomagnetic activity and ionospheric absorption of radio waves has been observed. These phenomena are probably connected by a considerably increased penetration of energetic particles into the atmosphere under conditions of geomagnetic activity.
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Laštovička, J. Relationship between microseisms, geomagnetic activity and ionospheric absorption of radio waves. Stud Geophys Geod 18, 307–309 (1974). https://doi.org/10.1007/BF01624481
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DOI: https://doi.org/10.1007/BF01624481