Myagkova I.N., Panasyuk M.I., Kalegaev V.V. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow

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Myagkova I.N., Panasyuk M.I., Kalegaev V.V. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow

Complex ORbital Observations in Near-Earth Space of the Activity of the Sun The third CORONAS satellite was launched at polar circular orbit 30 January, 2009 orbit altitude ~ 545-590 km inclination ~ 82.5 operated till 30 November 2009 One of the main goals of the experiment with the help of Electron-M-Pesca instrument on board space solar observatory CORONAS-Photon is the investigation of the relativistic electron flux dynamics in the Earth s magnetosphere and the outer radiation belt of the Earth s behavior as an important factor of space weather.

Outer ERB highlatitude boundary was determined by electron (>200 kev) fluxes measured on-board Coronas-Photon satellite during 2009

1. SEP events and solar charged particle penetration boundaries in the Earth s magnetosphere during geomagnetic disturbances; 2. Dynamics of the relativistic electron fluxes in the Earth s magnetosphere; 3. Energetic particle precipitation under the Earth s radiation belts ( an low and high latitudes). Map of electron flux (1-4 MeV) at 550 km altitude during 4 25/ 03/ 2009. Outer Radiation Belt Polar Regions Inner Rad. Belt

Project: «The Study of Solar Energetic Particles and their Interaction with the Earth s Magnetosphere» Electron-M-Pesca semiconductor telescope Scobeltsyn Institute of Nuclear Physics, Moscow State University Project Leader: Prof. Mikhail Panasyuk Registration Proton Fluxes and Spectra Electron Fluxes and Spectra Alpha-particle Fluxes Fluxes of C, N, O Nucley Energetic channels 4 16 MeV 16 28 MeV 41 55 MeV >80 MeV 0,2 1,0 MeV 1 4 MeV >4 MeV 5 16 MeV/q 16 24 MeV/q 6 15 MeV/q Detectors D1 D2 D3 D4 Eff. area, cm 2 6 6 6 6 Width, µm 375 375 375 375

Space Monitoring Data Center (SMDC) on MSU/SINP: http://smdc.sinp.msu.ru Visualisation Access to database

В Bz Np Vsw Рsw Кр Dst АЕ

Significant increases of the relativistic electron flux (1-4 MeV) in the Outer Radiation Belt has been detected after the small magnetic disturbances during March, 13 and 9 April, 9, 2009 coused by high-speed streams of solar wind. 2009, March, 4-25 e 1-4 MeV Solar wind density Solar wind velocity e 1-4 MeV, 4-25 March, 2009 e 1-4 MeV, 1-16 April, 2009

13 /03 14 февраля 09/04 06/05 The major processes believed to play a role in the electron energization are: 1. radial diffusion 2. rapid transport due to interplanetary shock-induced electric fields 3. local heating via wave-particle interactions

.03..04. 20-28 октября.10. 2009.03..04. 29 октября.10-2 ноября.11. 2009.03. We can see similar changes of electron belt maximum location during and after magnetic disturbances

Кp -28 nt 11/03/2009 13/03/2009 17/03/2009

ULF

EМP (CORONAS-Photon) Ee=1-4 MeV, h=550 км, L=5-6?

North South UT effect due to magnetospheric current systems Δ=1.5 град 12h Sun Sun Solar-magnetic coordinates Geographical coordinates Boundary location for UT=5,55h and UT=17,55h

Presented experimental results demonstrate that in spite of absence of significant geomagnetic disturbances during 2009 year (due to SA minimum) the strong electron flux enhancements in the outer ERB were observed. These electron flux enhancements are connected with arrival of high-speed solar wind streams. Mentioned increases were observed in March, April and the beginning of May, and also in July, August and the end of October 2009. During the specified time periods of wave activity increasing (ULF) was observed at several high-altitude stations. We assume that observed enhancements of relativistic electron flux can be caused by the wave activity increasing. It is possible because according to modern theoretical calculations the nonlinear interaction of energetic electrons with wave chorus of the big amplitude can lead to the fast increase of electron energy. Our observations show that near-earth s environment is strongly caused by the Sun even during solar minimum.

«European Geosciences Union General Assembly» Vienna, Austria, 02 07 May 2010

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