Юмото Кийохуми (Yumoto K.)
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1.

Количество страниц: 4 с.

In the present study we investigate the undulations at the equatorial boundary of diffuse aurora and their relationship to the development of magnetic and auroral substorms and excitation of Pc5 magnetic pulsation on January 14, 1999. The observed undulations had wave-length of ~200-300 km and amplitude of ~50-250 km and they propagated westward with the velocity of ~0,7 km/s. It is found that the undulations began ~40 min after the substorm onset and lasted for ~80 min, all the way to the end of the substorm. During both active and recovery phases of the substorm the undulations were accompanied by the enhancement of the DP2 equivalent current system and by the formation of WTS. Concurrently with undulations, there were observed Pc5 magnetic pulsations of an oscillation period roughly equal to the ratio of the undulation wavelength to their propagation velocity. Observations are interpreted in terms of the shear/ballooning instability excitation near the plasmapause and subsequent generation of drift hydromagnetic waves.

Formation of large-scale, "giant" undulations at the equatorial boundary of diffuse aurora and Pc5 magnetic pulsations during the January 14, 1999 magnetic storm / D. G. Baishev, E. S. Barkova, S. I. Solovyev, K. Yumoto, M. J. Engebretson and A. V. Koustov // Proceedings of the Fifth International Conference on Substorms : 16-20 May 2000 Congress Centre of the Arctic and Antarctic Research Institute, St. Petersburg, Russia. − Noordwijk, Netherlands : European Space Agency, 2000. − P. 427-430.

2.

Количество страниц: 2 с.

Global geomagnetic and auroral response to the variation in the solar wind dynamic pressure : [тезисы докладов] / A. V. Moiseyev, S. I. Solovyev, K. Yumoto, M. Engebretson // Physics of auroral phenomena : 30th annual seminar, 27 February – 2 March 2007 : abstracts. – 2007. – P. 34.

3.

Количество страниц: 2 с.

Evolution of ionospheric current systems for the geomagnetic impulse SI/SC by the magnetometer global network data : [тезисы докладов] / S. I. Solovyev, A. V. Moiseyev, M. Engebretson, K. Yumoto // Physics of auroral phenomena : 24 annual seminar, 27 February - 2 March 2001. – 2001. – P. 36.

4.

Количество страниц: 4 с.

Large-amplitude morning Pc5 magnetic pulsations during the main phase of intense magnetic storm were registered at magnetic stations of 190-200° magnetic meridians on January 21-22, 2005. Magnetic pulsations in the Pc5 frequency range observed at the GOES 10, 12 satellites in the noon and evening sectors exhibited a high degree of magnetic compessibility. A Los Alamos particle detector on board geostationary satellite observed the occurrence of energetic particle flux oscillations in the Pc5 band. The Pc5 pulsations were followed with the VLF-emission and riometer absorption modulation with the same period. The regions of maximal amplitude of Pc5 geomagnetic pulsations and deep modulation of riometer absorptions shifted to high latitudes in the same way. Significant and long-lasting compression of magnetosphere led, probably, to moderate pitch-angle diffusion of particle into the loss cone even at the middle latitudes. Analysis of coordinated data allowed us to suggest that a modulation effects of precipitating particles are caused by a compressional waves.

Manifestation of Magnetosphere Fluctuations during the Large Magnetic Storm of January 21-22, 2005 / D. G. Baishev, E. S. Barkova, V. A. Mullayarov, S. N. Samsonov, S. I. Solovyev, K. Yumoto // Solar Extreme Events Fundamental Science and Applied Aspects Nor-Amberd, Armenia 26-30 September 2005 : proceedings of the Second International Symposium / edited by A. Chilingarian and G. Karapetyan. − Erevan : Cosmic Ray Division, Alikhanyan Physics Institute, 2006. − P. 96-99.

5.

Количество страниц: 2 с.

Magnetospheric-ionospheric response to variations in the solar wind dynamic pressure during positive IMF Bz and a sharp change of IMF By direction : [тезисы докладов] / S. I. Solovyev, A. V. Moiseyev, K. Yumoto, M. Engebretson, A. Du // Physics of auroral phenomena : 29th annual seminar, 27 February – 3 March 2006 : abstracts. – 2006. – P. 36.

6.

Количество страниц: 1 с.

MAGDAS-9 magnetometers observations of strong earthquakes : [тезисы докладов] / Baishev D. G., Moiseev A.V., Bondar E. D., Kobyakova S. E., Yumoto K. // 10th International conference "Problems of geocosmos", St. Petersburg, Petrodvorets, October 6-10, 2014. – St. Petersburg : [s. n.], 2014. – P. 106.

7.

Количество страниц: 4 с.

Moiseyev, A. V. Characteristics of substorms stimulated by variations of the dynamic solar wind pressure and magnetospheric convection electric field / A. V. Moiseyev, S. I. Solovyev, K. Yumoto // Physics of auroral phenomena : proceedings of the 25th annual seminar, Apatity, 26 February – 1 March 2002. – 2002. – P. 29-32.

8.

Количество страниц: 4 с.

Specific features and development of Pi and Pm impulses at latitudes from the equator to the polar cap are studied. It is shown that formation of Pi and Pm impulses at high latitudes (Ф'=70°) is related to simultaneous intensifications of the westward and eastward currents on the dayside of the magnetosphere with a consequent shift of the eastward current to the pole. It leads to an increase of duration of Pi impulse with the growth of latitude. Inversion of Pi and Pm signs relative to the noon meridian takes place only at Ф'≈36-60°. At these latitudes the duration of Pi impulse also increases with growth of latitude, but the increase velocity is one order of magnitude larger than at Ф'=63-83°. The current system of SI impulse and possible reasons of Pi and Pm formation at different latitudes are discussed.

Moiseyev, A. V. Relation between the formation of preliminary and main SI impulses during a sharp compression of the magnetosphere by solar wind / A. V. Moiseyev, S. I. Solovyev, K. Yumoto // Physics of auroral phenomena : proceedings of the 25th annual seminar, Apatity, 26 February – 1 March 2002. – 2002. – P. 51-54.

9.

Количество страниц: 4 с.

Evolution of geomagnetic perturbations and aurora dynamics during the strong magnetic storms events / S. I. Solovyev, R. N. Boroev, A. V. Moiseyev, A. Du, K. Yumoto // Physics of auroral phenomena : proceedings of the 32nd annual seminar, Apatity, 3 – 6 March 2009. – 2010. – P. 41-44.

10.

Количество страниц: 9 с.

Якутская меридиональная цепочка (ЯМЦ) ИКФИА СО РАН, расположенная вдоль 190° магнитного меридиана, оснащена геофизическими и радиофизическими инструментами для мониторинга космической погоды на северо-востоке России. ЯМЦ включает четыре основные станции в Якутске, Тикси, Жиганске и Маймаге, и шесть дополнительных наблюдательных пунктов в Нерюнгри, Зырянке, Кыстатыам, Джарджане, Чокурдахе и на о. Котельный. Она обеспечивает непрерывный мониторинг околоземного космического пространства с целью получения данных о вариациях магнитного поля, космического радиошума, ОНЧ эмиссий и ионосферных параметров в сложной системе верхняя атмосфера-ионосфера-магнитосфера. Дополнительно проводятся долговременные экспериментальные исследования влияния эффектов космической погоды на здоровье человека в Тикси и Якутске. В статье описывается меридиональная цепочка инструментов на субавроральных и авроральных широтах и дается краткий обзор научных результатов мониторинга и исследования эффектов космической погоды в Якутии. Также сообщается об участии ИКФИА СО РАН в международных проектах (Intermagnet, MAGDAS, GIRO).

Monitoring and investigating space weather effects with meridional chain of instruments in Yakutia: a brief overview = Мониторинг и исследование эффектов космической погоды с помощью меридиональной цепочки инструментов в Якутии: краткий обзор / D. G. Baihsev, S. N. Samsonov, A. V. Moiseev, R. N. Boroyev, A. E. Stepanov, V. I. Kozlov, A. A. Korsakov, A. A. Toropov, A. Yoshikawa, K. Yumoto // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017, т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 27-35.
DOI: 10.12737/22607