Abstract Ionospheric disturbances in the equinox periods of 2005–2006 are considered on the basis of the ionosondes of vertical and oblique sounding located in the north-east region of Russia. It is found that the X-ray flares observed in the first half of September 2005 caused an additional increase in the ionization of the lower ionosphere in the daytime, this fact leading to a development of absorption and an increase in the lowest observable frequencies at the Magadan-Irkutsk and Noril’sk-Irkutsk radio paths. Wave-like changes in the maximum observable frequencies and critical frequencies with periods of about 2–2.5 h were detected during the magnetic disturbances. Oscillations of the planetary wave type with periods of 4–5 days were also revealed.
Ionospheric disturbances in the north-east region of Russia according to ionosonde data in the periods of equinoxes
Cosmic Research ; 46 , 4 ; 339-346
2008-08-01
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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