Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51..571z&link_type=abstract
Geomagnetism and Aeronomy, Volume 51, Issue 5, pp.571-583
Physics
Scientific paper
Disturbances in the magnetic field and magnetospheric and ionospheric plasma registered on December 14-16, 2006, during a strong magnetic storm caused by a solar flare of 4 B/X3.4 class are studied. It is shown that in the north of Yakutia, interactions between the Earth's magnetosphere and the region of high dynamic pressure of the solar wind led to the formation of sporadic layers in the ionospheric E and F regions, depletion of the critical frequency of the F2 layer, and total absorption. At the end of the magnetic storm's main phase, anomalously high values of foF2 exceeding the quiet level by a factor of 1.5-1.7 were detected. It was found that the disturbances detected by ground-based observatories had developed on the background of changes in the temperature, density, and the pitch-angle distribution of particles at the geostationary orbit manifesting radial shifts of magnetospheric structures (magnetopause, cusp/cleft, and plasma sheet) relative to the observation points. A conclusion is drawn that in this case, changes in the near-Earth plasma and magnetic field manifest the dynamics of the physical conditions at the magnetospheric boundary and diurnal rotation of the Earth.
Pirog O. M.
Polekh Nelya M.
Zolotukhina N. A.
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