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GEOMAGNETIC CONSEQUENCES OF THE SOLAR FLARES DURING THE LAST HALE SOLAR CYCLE (II)
 

Summary: GEOMAGNETIC CONSEQUENCES OF THE SOLAR FLARES
DURING THE LAST HALE SOLAR CYCLE (II)
Georgeta Maris, Miruna-Daniela Popescu, Marilena Mierla
Astronomical Institute of the Romanian Academy
Str.Cutitul de Argint 5, Bucharest 28, RO-75212
gmaris@aira.astro.ro, miruna@aira.astro.ro, marilena@aira.astro.ro
ABSTRACT/RESUME
The effects of the solar energetic phenomena cover the
entire terrestrial environment, from the outer
atmospheric layer to the ground. The energy source of
all these geomagnetic disturbances is the solar plasma
that may originate from solar eruptive phenomena that
take their energy from magnetic field of the Sun. This
paper is part of a larger study concerning the
geomagnetic effects produced by solar phenomena. We
analyze the cyclic variability of solar flares (registered
in H and X-ray) and compare it with the variations of
some geomagnetic indices (aa index and the number of
sudden storm commencements (SSCs)) for the last
Hale cycle. The solar cycles 22 and 23 are different in

  

Source: Armagh Observatory

 

Collections: Physics