Analysis of the Electromagnetic Spectrum under the Extremely Low Frequency Band: Frequency Sub-Bands Classification

In this paper we analyze the presence and effects of classical electromagnetic waves with frequencies under 3Hz; which will be further referred as Under Extremely Low Frequency band (UELFB) waves. The nature of such kind of waves is extreme, as they are larger than Earths diameter. Because of the lack of useful engineering applications, organizations like the IEEE or the ITU have not given an official classification for this electromagnetic band. On the other hand, classical electromagnetic theory suggests that UELFB waves could be radiated by many astronomical objects, and then their interaction with matter (for example, dust, gas, and particles) could create stationary structures in the Universe. This paper proposes a UELFB wave classification, into frequency sub-bands, considering their wavelengths compared to the size of astronomical objects commonly seen in the Universe. The proposed classification for the fraction of the spectrum under the Extremely Low Frequency band contributes to the understanding of EM radiation characterized by frequencies under3Hz.