Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 23009 10.12737/stp-43201807 Results of current research Results of current research Results of current research Polarization dynamics of Pi2 pulsations at midlatitudes during development of substorms in the auroral zone Polarization dynamics of Pi2 pulsations at midlatitudes during development of substorms in the auroral zone Рахматулин Равиль Анатольевич Rakhmatulin Ravil Anatolyevich

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Пашинин Александр Юрьевич Pashinin Aleksandr Yuryevich pash@iszf.irk.ru Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 4 3 46 51 https://naukaru.ru/en/nauka/article/23009/view

We examine the changes in the orientation of the major axis of the polarization ellipse of irregular geomagnetic pulsations Pi2, observed at midlatitudes during a substorm disturbance developing in the auroral zone of the Russian Arctic sector. We have found the dependence of the polarization ellipse orientation on the longitude of a corresponding substorm. The results of current studies are compared with earlier results of similar studies using materials on the North American continent. We have concluded that the results are similar in general, with a slight discrepancy which may be due to peculiarities of the geological structure of the earth crust in the Russian Arctic sector.

We examine the changes in the orientation of the major axis of the polarization ellipse of irregular geomagnetic pulsations Pi2, observed at midlatitudes during a substorm disturbance developing in the auroral zone of the Russian Arctic sector. We have found the dependence of the polarization ellipse orientation on the longitude of a corresponding substorm. The results of current studies are compared with earlier results of similar studies using materials on the North American continent. We have concluded that the results are similar in general, with a slight discrepancy which may be due to peculiarities of the geological structure of the earth crust in the Russian Arctic sector.

 magnetosphere geomagnetic disturbances auroral substorm geomagnetic pulsations Pi2 polarization of geomagnetic pulsations Russian Arctic sector magnetic observatories magnetosphere geomagnetic disturbances auroral substorm geomagnetic pulsations Pi2 polarization of geomagnetic pulsations Russian Arctic sector magnetic observatories

Allen J., Abston C.C., Morris L.D. Geomagnetic Data for February, March 1976. Rep.UAG-62, 63 . World Data Center for Solar-Terr. Phys. 1977, p. 55. Allen J., Abston C.C., Morris L.D. Geomagnetic Data for February, March 1976. Rep.UAG-62, 63 . World Data Center for Solar-Terr. Phys. 1977, p. 55. Costa A.D., Parkhomov V. A., Rakhmatulin R.A., Rodriguez F. Influence of longitudinal localization of a substorm on low-latitude Pi2 parameters. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1984, iss. 70, pp. 171-177. (In Russian). Costa A.D., Parkhomov V. A., Rakhmatulin R.A., Rodriguez F. Influence of longitudinal localization of a substorm on low-latitude Pi2 parameters. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1984, iss. 70, pp. 171-177. (In Russian). Koshelevsky V.K., Raspopov O.M., Starkov G.V. The connection of parameters of geomagnetic pulsations Pi2 with processes in the auroral zone. Geomagnetizm i aeronomiya. [Geomagnetism and Aeronomy]. 1972, vol. 12, no. 5, pp. 886-891. (In Russian). Koshelevsky V.K., Raspopov O.M., Starkov G.V. The connection of parameters of geomagnetic pulsations Pi2 with processes in the auroral zone. Geomagnetizm i aeronomiya. [Geomagnetism and Aeronomy]. 1972, vol. 12, no. 5, pp. 886-891. (In Russian). Krakovetsky Yu.K., Platonov O.I., Popov L.N., Doronina I.P. Aurora spatial distribution of a polar light and its relation with the Earth crust structure. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1982, iss. 62, pp. 155-164. (In Russian). Krakovetsky Yu.K., Platonov O.I., Popov L.N., Doronina I.P. Aurora spatial distribution of a polar light and its relation with the Earth crust structure. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1982, iss. 62, pp. 155-164. (In Russian). Kuwashima M.A. A model of magnetic Pi2 pulsations based on ULF observation from high to middle latitudes on the ground. Memoirs of National Institute of Polar Res. 1981. Spec. № 16, pp. 15-21. Kuwashima M.A. A model of magnetic Pi2 pulsations based on ULF observation from high to middle latitudes on the ground. Memoirs of National Institute of Polar Res. 1981. Spec. № 16, pp. 15-21. Popov L.N., Krakovetsky Yu.K., Zakharenko V.N., Parnachev V.P., Odintsov N.M. On revealing geological structures by the distant method of ionosphere-telluric profiling (by example of northern districts of Siberia). Vestnik Tomskogo gosudarstvennogo universiteta. Ser. Nauki o Zemle [Tomsk State University Bull. Ser. Earth Sci.]. 2010, no. 399, pp. 205-209. (In Russian). Popov L.N., Krakovetsky Yu.K., Zakharenko V.N., Parnachev V.P., Odintsov N.M. On revealing geological structures by the distant method of ionosphere-telluric profiling (by example of northern districts of Siberia). Vestnik Tomskogo gosudarstvennogo universiteta. Ser. Nauki o Zemle [Tomsk State University Bull. Ser. Earth Sci.]. 2010, no. 399, pp. 205-209. (In Russian). Pudovkin M.I., Raspopov O.M., Kleymenova N.G. Vozmushcheniya electromagnitnogo polya Zemli. Chast 2. [Disturbances of the Earth's electromagnetic field. Part 2]. Leningrad, LGU Publ., 1976, 270 p. (In Russian). Pudovkin M.I., Raspopov O.M., Kleymenova N.G. Vozmushcheniya electromagnitnogo polya Zemli. Chast 2. [Disturbances of the Earth's electromagnetic field. Part 2]. Leningrad, LGU Publ., 1976, 270 p. (In Russian). Rakhmatulin R.А., Pashinin A.Y., Hayashi K. The observation of global Pi2 pulsation in the mid-latitudes during small substorms. Proc. the 5 Intern. Conference on Substorms. St. Petersburg, Russia, July 2000, ESA SP-443, pp. 561-564. Rakhmatulin R.A., Pashinin A.Y., Hayashi K. The observation of global Pi2 pulsation in the mid-latitudes during small substorms. Proc. the 5 Intern. Conference on Substorms. St. Petersburg, Russia, July 2000, ESA SP-443, pp. 561-564. Rakhmatulin R.А., Pashinin A.Yu., Zhao Hua. An investigation of near-equatorial geomagnetic Pi2 pulsations. Chinese J. Space Sci. 2005, vol. 25, no 5, pp. 430-432. Rakhmatulin R.A., Pashinin A.Yu., Zhao Hua. An investigation of near-equatorial geomagnetic Pi2 pulsations. Chinese J. Space Sci. 2005, vol. 25, no 5, pp. 430-432. Rakhmatulin R.A., Petrovsky M.A. Research in-to dynamic spectra of high-latitude Pi2-pulsations. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1994, iss. 103, pp. 49-56. (In Russian). Rakhmatulin R.A., Petrovsky M.A. Research in-to dynamic spectra of high-latitude Pi2-pulsations. Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa [Res. on Geomagnetism, Aeronomy and Solar Phys.]. 1994, iss. 103, pp. 49-56. (In Russian). Raspopov O.M., Troitskaya V.M. Razvitie subburi v geomagnitnykh pulsatsiyakh. Vysokoshirotnye geofizicheskie yavleniya [Substorm Development in Geomagnetic Pulsations. High-latitude Geophysical Phenomena]. Leningrad, 1974, pp. 232-247. (In Russian). Raspopov O.M., Troitskaya V.M. Razvitie subburi v geomagnitnykh pulsatsiyakh. Vysokoshirotnye geofizicheskie yavleniya [Substorm Development in Geomagnetic Pulsations. High-latitude Geophysical Phenomena]. Leningrad, 1974, pp. 232-247. (In Russian). Shiokawa K., Yumoto K., Olson J.V. Multiple auroral brightening and associated Pi2 pulsations. Geophys. Res. Lett. 2002, vol. 29, no 11, pp. 32/1-32/4. Shiokawa K., Yumoto K., Olson J.V. Multiple auroral brightening and associated Pi2 pulsations. Geophys. Res. Lett. 2002, vol. 29, no 11, pp. 32/1-32/4. URL: http://wdc.kugi.kyoto-u.ac.jp/plot_realtime/quick/index. html (accessed November 23, 2016). URL: http://wdc.kugi.kyoto-u.ac.jp/plot_realtime/quick/index. html (accessed November 23, 2016). URL: http://ckp-rf.ru/ckp/3056 (accessed November 23, 2017). URL: http://ckp-rf.ru/ckp/3056 (accessed November 23, 2017).