employee from 01.01.2008 until now
Apatity, Murmansk, Russian Federation
Apatity, Russian Federation
Apatity, Russian Federation
St. Petersburg, Russian Federation
Saint Petersburg, Russian Federation
St. Petersburg, Russian Federation
Sankt-Peterburg, St. Petersburg, Russian Federation
Apatity, Murmansk, Russian Federation
Apatity, Murmansk, Russian Federation
Apatity, Russian Federation
Apatity, Russian Federation
Apatity, Murmansk, Russian Federation
During the North Pole–41 expedition, three components of the VLF electromagnetic field were simultaneously measured on a drifting ice-resistant platform and at the Lovozero and Barentsburg observatories. We consider three VLF events that occurred in magnetically quiet time. During two of them (the events on January 24, 2023 and March 12, 2024), auroral hiss bursts were recorded at three stations located in the auroral and circumpolar regions and spaced up to 2.600 km apart. The spectral and temporal characteristics of the bursts at all the stations were almost the same. The fact that hiss was recorded with the same properties at such large distances can be explained under the assumption of a homogeneous flow of auroral electrons with energies from 0.1 to 10 keV throughout the precipitation area, which generate quasi-electrostatic waves at altitudes 10–20 thousand km, along with the simultaneous presence of small-scale ionospheric irregularities in the vicinity of all three stations, where these waves are scattered into the propagation cone to the Earth surface. We examine the case of hiss recording (the January 25, 2023 event) demonstrating the locality of the hiss recording area during one day — a hiss burst is first observed at one station, then at another. This is probably due to the appearance/disappearance of local areas of small-scale irregularities, where quasi-electrostatic waves are scattered providing propagation to the Earth surface.
auroral hiss, ionosphere, VLF wave
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