Why Does the October Effect Not Occur at Night?
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DOI: 10.1029/2023gl107445
Abstract: The October effect is known as a rapid and strong decrease in the signal amplitude of radio waves with very low frequency (VLF), reflected at the lowest edge of the ionosphere. This strong decrease can… read more here.
Keywords: effect; mechanism; occur night; october effect ... See more keywords
Investigation of the October effect in very low-frequency (VLF) signals
Sign Up to like & getrecommendations! Published in 2025 at "Annales Geophysicae"
DOI: 10.5194/angeo-43-55-2025
Abstract: Abstract. Subionospheric very low-frequency (VLF) radio signals are reflected by free electrons in the ionospheric D-region at about 60–90 km altitude and can propagate over long distances, which makes them useful for monitoring the state of… read more here.
Keywords: vlf; vlf signals; october effect; low frequency ... See more keywords