Abstract
For the first time, simultaneous observations of very low frequency (VLF) emissions at auroral latitudes (L = 5.3) are carried out at two points located at close geomagnetic latitudes and spaced in longitude by 400 km: the Finnish Kannuslehto station (Φ = 64.2°) and the Russian Lovozero observatory (Φ = 64.1°). A recording equipment with similar frequency responses was used. The first results of a comparison of simultaneous observations showed that, in the overwhelming majority of cases, bursts of VLF emission appeared at both points synchronously with an identical (more often right-handed) polarization of the magnetic field of VLF waves, which can be evidence in favor of large dimensions of the ionosphere exit region of VLF waves. A simultaneous burst of quasi-periodic VLF emissions that occurred on February 02, 2013, during a substorm at 23–24 UT is discussed in detail. Additionally, VLF bursts were recorded which were observed only at one point, e.g., the appearance of left-hand polarized periodic emissions (PEs) in band 2.5–4.0 kHz with a repetition period of 3–4 s.
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Original Russian Text © J. Manninen, Yu.V. Fedorenko, N.G. Kleimenova, O.V. Kozyreva, A.S. Nikitenko, 2014, published in Geomagnetizm i Aeronomiya, 2014, Vol. 54, No. 1, pp. 36–42.
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Manninen, J., Fedorenko, Y.V., Kleimenova, N.G. et al. First results of simultaneous recording of VLF emissions at two closely located points at auroral latitudes. Geomagn. Aeron. 54, 32–38 (2014). https://doi.org/10.1134/S0016793214010083
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DOI: https://doi.org/10.1134/S0016793214010083