Ionospheric processes during the 7–10 November 2004 extreme geospace storm. 1. Observation results

Heading: 
Space and Atmospheric Physics
1Grigorenko, Ye.I, 2Emelyanov, LYa., 1Pazura, SA, 3Chernogor, LF
1Institute of Ionosphere of the National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kharkiv, Ukraine
2Institute of Ionosphere of the NAS of Ukraine and MES of Ukraine, Kharkiv, Ukraine
3V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
Kosm. nauka tehnol. 2007, 13 ;(4):062-076
https://doi.org/10.15407/knit2007.04.062
Publication Language: Russian
Abstract: 
The study results of the F2 region and topside ionosphere behaviour during the 7–10 November 2004 geospace storm that arises from the imposition of two consistent extreme magnetic disturbances (Крmax= 8.7) are presented. The observations were carried out with the Kharkiv incoherent scatter radar. Substantial effects of negative ionosphere disturbance were detected. Among them were the decrease in the F2 layer peak electron density by a factor of 6–7 and in the total electron content below 1000 km height by a factor of 2, uplifting in the ionosphere F2 layer height by about 300 km during the night and by 150–180 km in the daytime, unusual night heating of plasma with increase of ion and electron temperatures by up to 2000 and 3000 K, respectively; decrease of the fractional hydrogen ion density N (H +)/Ne  by a factor of 3.5 due to the emptying of the magnetic flux tube over Kharkiv. During the main storm phase the effects that are usually peculiar to the high latitude ionosphere including coherent echoes were revealed. The results obtained can point to the shift of large-scale structures of the high latitude ionosphere (auroral oval, main ionospheric trough, hot zone etc.) to the latitudes that are closed to the Kharkiv radar latitude.
Keywords: electron density, ionosphere disturbance, radar
Full text (PDF)
 
References: 
1. Afraimovich E. L., Voeykov S. V., Perevalova N. P., Ratovsky K. G. Large-scale disturbances of auroral origin during strong magnetic storms of October 29 31, 2003, and November 7 11, 2004, according to the data of the GPS network and ionosondes. Geomagnetizm i Aeronomiia, 46 (5), 627—636 (2006) [in Russian].
https://doi.org/10.1134/S0016793206050070
2. Bogovskii V. K., Grigorenko E. I., Taran V. I. Solar Cyclic Variations in Hydrogen Ion Density in the Topside Ionosphere. Kosm. nauka tehnol. Dodatok, 8 (2), 164—172 (2002) [in Russian].
3. Garmash K. P., Leus S. G., Pazura S. A., et al. Statistics of Terrestrial Electromagnetic Field Fluctuation. Radio Physics and Radio Astronomy, 8 (2), 163—180 (2003) [in Russian].
4. Grigorenko E. I., Taran V. I., Lazorenko S. V., Chernogor L. F. Wave disturbances in the ionosphere accompanied the solar flare and the strongest magnetic storm of September 25, 1998. Geomagnetizm i Aeronomiia, 43 (6), 770—787 (2003) [in Russian].
5. Grigorenko Ye. I., Lysenko V. N., Taran V. I., Chernogor L. F. Results of radiophysical studies of the processes in the ionosphere accompanying the very strong magnetic storm on 25 September 1998. Uspehi sovremennoj radiojelektroniki, No. 9, 57—94 (2003) [in Russian].
6. Grigorenko E. I., Lysenko V. N., Taran V. I., Chernogor L. F. Specific features of the ionospheric storm of March 20-23, 2003. Geomagnetizm i Aeronomiia, 45 (6), 789—802 (2005) [in Russian].
7. Grigorenko E. I., Pazura S. A., Taran V. I., et al. Dynamic processes in the ionosphere during the severe magnetic storm of May 30-31, 2003. Geomagnetizm i Aeronomiia, 45 (6), 803—823 (2005) [in Russian].
8. Yermolaev Yu. I., Zelenyi L. M., Zastenker G. N., et al. A year later: Solar, heliospheric, and magnetospheric disturbances in November 2004. Geomagnetizm i Aeronomiia, 45 (6), 723—765 (2005) [in Russian].
9. Kiyashko G. A., Grigorenko E. I. Specific Altitude-Time Distribution of Hydrogen Ions above Kharkov. Vestn. KhGPU, No. 103, 45–47 (2000) [in Russian].
10. Kozyreva O. V., Kleimenova N. G., Kornilova T. A., et al. Unusual Spatial-Temporal Dynamics of Geomagnetic Disturbances During the Main Phase of the Extremely Strong Magnetic Storm of November 7-8, 2004. Geomagnetizm i Aeronomiia, 46 (5), 614—626 (2006) [in Russian].
https://doi.org/10.1134/S0016793206050057
11. Polekh N. M., Pirog O. M., Voeikov S. V., et al. Ionospheric Disturbances in the East-Asian Region During the Geomagnetic Period in November 2004. Geomagnetizm i Aeronomiia, 46 (5), 627—636 (2006) [in Russian].
https://doi.org/10.1134/S0016793206050069
12. Taran V. I. A study of the natural and artificially disturbed ionosphere by the incoherent scatter method. Geomagnetizm i Aeronomiia, 41 (5), 659—666 (2001) [in Russian].
13. Chernogor L. F., Grigorenko Ye. I., Taran V. I., Tyrnov O. F. Ionosphere wave-like disturbances (WLD) following the September 23, 1998 Solar flare from Kharkiv incoherent scatter radar observations. XXVII General Assembly of the International Union of Radio Science: Programme, Poster Presentations Maastricht Exhibition and Congress Centre (MECC); Maastricht the Netherlands, 17—24 August 2002, 2278 (Maastricht, 2002).
14. Chernogor L. F., Grigorenko Ye. I., Taran V. I., Tyrnov O. F. Dynamic processes in the near-Earth plasma during the September 25, 1998 magnetic storm from Kharkiv incoherent scatter radar data. XXVII General Assembly of the International Union of Radio Science: Programme, Poster Presentations Maastricht Exhibition and Congress Centre (MECC), Maastricht the Netherlands, 17—24 August 2002, 2280 (Maastricht, 2002).
15. Mishin E., Foster J. C., Potekhin A. P., et al. Ionospheric perturbations caused by quasi-periodic magnetic disturbances during the September 25, 1998 storm. EOS Trans. AGU, 81 N 48, Fall Meeting, F 947 (San Francisco, 2000).

16. Mishin E., Foster J. C., Rich F. J., Taran V. Prompt ionospheric response to short period solar wind variations during the magnetic cloud event Sep 25, 1998. EOS Trans. AGU, 82 No. 20, Spring Meeting, S 291 (San Francisco, USA, May 15, 2001).