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Ionospheric disturbances in the north-east region of Russia according to ionosonde data in the periods of equinoxes


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.

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  1. Zhang, D.I., Xiao Z., Igarashi, K., and Ma, G.Y., GPS-Derived Ionospheric TEC Response to a Solar Flare That Occurred on 14 July, 2000, Radio Sci., 2002, vol. 37, no. 5, p. 1086.

    Article  ADS  Google Scholar 

  2. Tsurutani, A.O., Judge, D., et al., The October 28, 2003 extreme EUV Solar Flare and Resultant Extreme Ionospheric Effects: Comparison to Other Halloween Events and the Bastille Day Event, Geophys. Res. Lett., 2005, vol. 32, no. 3, L03S09. doi: 10/1029/2004GL021475.2005.

  3. Kunitsyn, V.E., Kozharin, M.A., Nesterov, I.A., and Kozlova, M.O., Manifestations of Heliospheric Disturbances of October 2003 in the Ionosphere over Western Europe according to the Data of CNSS Tomography and Ionosonde Measurements, Vestn. Mosk. Gos. Univ., Ser. 3: Fiz. Astron., 2004, no. 6, pp. 67–69.

  4. Dmitriev, A.V., Yeh, H.-C., Chao, J.-K., et al., Top-Side Ionosphere Response to Extreme Solar Events, Ann. Geophys., 2006, vol. 27, no. 5, pp. 1469–1477.

    Article  ADS  Google Scholar 

  5. Afraimovich, E.L., Voeikov SV., Perevalova N.P., and Ratovskii, K.G., Large-Scale Disturbances of Auroral Origin during Magnetic Storms on October 29–31, 2003 and November 7–11, 2004 according to the Data of Network of GPS and Ionosondes, Geomagn. Aeron., 2006, vol. 46, no. 5, pp. 637–642.

    Article  Google Scholar 

  6. Berngardt, O.I., Zolotukhina, N.A., and Shpynev, B.G. Peculiarities of Spectral Characteristics of Coherent Echo during Magnetic Storm on July 15–17, 2000 as Observed by the Irkutsk IS Radar, Geomagn. Aeron., 2004, vol. 44, no. 6, pp. 787–798.

    Google Scholar 

  7. Zherebtsov, G.A., Pirog, O.M., and Polekh, N.M., Ionosphere Conditions in the East-Asian Longitudinal Sector during a Geoactive Period of October–November 2003, Geomagn. Aeron., 2005, vol. 45, no. 1, pp. 106–113.

    Google Scholar 

  8. Ivanov, V.A., Kurkin, V.K, Nosov, V.E., et al., LFM Ionosonde and Its Application in Ionospheric Studies, Izv. Vyssh. Uchebn. Zaved., Radiofiz., 2003, vol. 46, no. 11, pp. 919–952.

    Google Scholar 

  9. Kurkin, V.I., Pirog, O.M., and Polekh, N.M., Cyclic and Seasonal Variations of Ionospheric Effects of Magnetic Storms, Geomagn. Aeron., 2004, vol. 44, no. 5, pp. 634–642.

    Google Scholar 

  10. Bilitza, D., International Reference Ionosphere, Radio Sci., 2001, vol. 36, no. 2, pp. 261–275.

    Article  ADS  Google Scholar 

  11. Mitra, A.P., Ionospheric Effects of Solar Flares, Dordrecht: D. Reidel, 1974. Translated under the title Vozdeistvie solnechnykh vspyshchek na ionosferu Zemli, Odintsov, I.N., Ed., Moscow: Mir, 1977.

    Google Scholar 

  12. Medvedev, A.V., Ratovskii, K.G., and Tolstikov, M.V., Investigation of Moving Ionospheric Disturbances Using Several Radiophysics Instruments, Baikal’skaya Mezhdunarodnaya molodezhnaya nauchnaya shkola po fundamental’noi fizike. Trudy VIII konferentsii molodykh uchenykh “Astrofizika i fizika okolozemnogo kosmicheskogo prostranstva” (Baikal Intern. School for Young Scientists on Fundamental Physics. Proc. VIII Conf. of Young Scientists “Astrophysics and Physics of Near-Earth Space”), Irkutsk, 2005, pp. 147–149.

  13. Kurkin, V.I., Polekh, N.M., Chernigovskaya, M.A., and Abushenko, N.A., Investigation of Influence of Atmospheric Processes on Ionization of the F-2 Layer of the Ionosphere,, Opt. Atmos. Okeana, 2006, vol. 19, no. 12, pp. 1087–1091.

    Google Scholar 

  14. Pirog I.I., Polekh N.M., and Chistyakova, L.V., Longitudinal Variation of Critical Frequencies in Polar F-region, Adv. Space Res., vol. 27, no. 8, pp. 1395–1398.

  15. Klimenko, V.V. and Namgaladze, A.A., Ionospheric Effects of Zonal and Meridional Electric Fields in the Evening Sector, Geomagn. Aeron., 1977, vol. 17, no. 3, pp. 441–444.

    ADS  Google Scholar 

  16. Schlesier, A.C. and Buonsanto, M.J., The Millstone Hill Ionosphere Model and Its Application to the May 26–27, 1990, Ionospheric Storm, J. Geophys. Res., 1999, vol. 104, pp. 22453–22468.

    Article  ADS  Google Scholar 

  17. Polekh, N.M., Chistyakova, L.V., and Moshkova, V.A., Specific Features of Propagation of SW Radio Waves on the Route Magadan-Irkutsk during Magnetic Storm on May 15, 1997, Baikal’skaya Mezhdunarodnaya molodezhnaya nauchnaya shkola po fundamental’noi fizike Trudy VII konferentsii molodykh uchenykh “Vzaimodeistvie polei i izlucheniya s veshchestvom” ((Baikal Intern. School for Young Scientists on Fundamental Physics. Proc. VII Conf. of Young Scientists “Interaction of Fields and Radiations with Matter”), Irkutsk, 2004, pp. 99–101.

  18. Hajkowicz, L.A. and Hunsucker, R.D., A Simultaneous Observation of Large-Scale Periodic TIDs in Both Hemispheres Following on Onset of Auroral Disturbances, Planet. Space Sci., 1987, vol. 35, no. 6, pp. 785–791.

    Article  ADS  Google Scholar 

  19. Prolss, G.W. and Jung, M.J., Traveling Atmospheric Disturbances as a Possible Explanation for Daytime Positive Storm Effects of Moderate Duration at Middle Latitudes, J. Atmos. and. Solar-Terr. Phys., 1978, vol. 40, pp. 1351–1354.

    Article  ADS  Google Scholar 

  20. Prolss, G.W. and Ocko, M., Propagation of Upper Atmosphere Storm Effect towards Lower Latitudes, Adv. Space Res., 2000, vol. 26, pp. 131–135.

    Article  ADS  Google Scholar 

  21. Kazimirovsky, E.S., Herraiz, M., and De la Morena, B.A., Effects on the Ionosphere due to Phenomena Occurring Below It, Survey in Geophysics, 2003, no. 24, pp. 139–184.

  22. Lastovicka, J., Forcing of the Ionosphere by Waves from Below, J. Atmos. and Solar-Terr. Phys., 2006, vol. 68, pp. 479–497.

    Article  ADS  Google Scholar 

  23. Rishbeth, H., F-Region Links with Lower Atmosphere, J. Atmos. Solar-Terr. Phys., 2006, vol. 68, pp. 469–478.

    Article  ADS  Google Scholar 

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Original Russian Text © V.I. Kurkin, N.M. Polekh, O.M. Pirog, I.N. Poddel’skii, A.E. Stepanov, 2008, published in Kosmicheskie Issledovaniya, 2008, Vol. 46, No. 4, pp. 348–355.

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Kurkin, V.I., Polekh, N.M., Pirog, O.M. et al. Ionospheric disturbances in the north-east region of Russia according to ionosonde data in the periods of equinoxes. Cosmic Res 46, 339–346 (2008).

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  • 94.20.Vv