Документы 31 - 40 из 44
31.

Количество страниц: 4 с.

Sokolov, V. D. Dependence of appearance frequency of auroral absorption on its intensity / V. D. Sokolov, S. N. Samsonov // Physics of auroral phenomena : proceedings of the 25th annual seminar, Apatity, 26 February – 1 March 2002. – 2002. – P. 55-58.

32.

Количество страниц: 3 с.

Examination of auroral absorption (AA) occurrence rate and AA meridional distribution versus local time and in the course of the solar cycle has been performed by riometer observations from 1985 to 1995 at the longitude of Yakutsk. Geomagnetic latitude of the region of absorption maximum occurrence changes in the course of the solar cycle from 66.5° to 64.4°. The largest displacement of this region to lower latitudes is observed during years of maximum solar activity. The half-width of the region is ~8° at solar minimum and ~10° at solar maximum. It has been also revealed that the region of AA is shifted to higher latitudes at daytime (1000-1400LT), and to lower ones in the evening (1800-2000LT), the displacement from the daily average position being ~1° and ~3° in the years of solar activity maximum and minimum, respectively. In all years at 2000-2100LT a short-term extension of the AA region by 1-4° is observed. The interpretation of the observationa is proposed.

Sokolov, V. D. The dynamics of auroral absorption parameters in the 22nd solar activity cycle / V. D. Sokolov, S. N. Samsonov // Physics of auroral phenomena : proceedings of the 26th annual seminar, 25 - 28 February 2003. – 2003. – P. 95-97.

33.

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.

34.

Количество страниц: 4 с.

By global geomagnetic observation data the variations of intensity and dynamics of auroral electrojets, low-latitude disturbances at latitudes ~10-55°, SYM-H and studied. It is shown that positive values of SYM-H and Dst or the decrease of their negative values correspond to the growth period of Pd. The enhancement of magnetic field depression at latitudes Ф'~10-30° with the maximum ∆H in the evening sector is observed at negative values of IMF Bz and is accompanied by the enhancement of auroral electrojets in all temporal sectors and their southward shift. The maximum values of Dst ~-400 nT correspondent to the most intensity of western (eastern) electrojet in the midnight (evening) sector with a current center at the lowest latitudes. The possible sources of Dst and SYM-H variations are discussed.

Dependence of High-Latitude and Low-Latitude Geomagnetic Disturbances on Solar Wind Parameters during the Magnetic Storm of November 7-8, 2004 / S. I. Solovyev, R. N. Boroyev, A. V. Moiseyev, A. Du, 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. 104-106.

35.

Количество страниц: 2 с.

Evidence of the Psi geomagnetic pulsations burst excitation as the direct response to the solar wind pressure pulses : [тезисы докладов] / S. I. Solovyev, A. V. Moiseyev, D. G. Baishev, K. Yumoto, M. Engebretson // Physics of auroral phenomena : 24 annual seminar, 27 February - 2 March 2001. – 2001. – P. 48.

36.

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.

37.

Количество страниц: 4 с.

Geomagnetic sudden impulse characteristics in dependence of the IMF orientation / S. I. Solovyev, A. V. Moiseyev, M. Engebretson, K. Yumoto, A. Du // Physics of auroral phenomena : proceedings of the 29th annual seminar, Apatity, 27 February – 3 March 2006. – 2007. – P. 116-119.

38.

Количество страниц: 4 с.

Analysis of the global magnetosphere-ionosphere response to solar wind dynamic pressure variations under the negative IMF Bz has been performed. It is shown that an increase in the dynamic pressure leads to a double response of the ionospheric currents and aurora, i.e. simultaneously (within the accuracy of 1 min) and ~5-7 min afterward. Thereby, the eastward and westward convective electrojets are enhanced in the evening and morning sectors respectively, followed by the intensification of the westward current in the near midnight and evening sectors. The intensification of the electrojets is followed by extension of the diffuse precipitation zone and its high latitude boundary movement to the pole and to the east in the midnight-to-morning sector. In our case, no poleward or westward extension of aurora before midnight is observed. The disturbance triggered by a dynamic pressure increase may be considered as a convection disturbance associated with reconstruction of the DP2 current system.

Magnetosphere-ionosphere response to magnetosphere compression by the solar wind / S. I. Solovyev, A. V. Moiseyev, K. Yumoto, M. Engebretson // Physics of auroral phenomena : proceedings of the 26th annual seminar, 25 - 28 February 2003. – 2003. – P. 41-44.

39.

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.

40.

Количество страниц: 4 с.

The character of geomagnetic and auroral response to solar wind dynamic pressure variation and the dynamics of particles injected into the magnetosphere / S. I. Solovyev, A. V. Moiseyev, K. Yumoto, M. Engebretson, A. Du // Physics of auroral phenomena : proceedings of the 29th annual seminar, Apatity, 27 February – 3 March 2006. – 2007. – P. 112-115.