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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:18 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Solar Flare Cycles
Authors:
Georgeta Maris*, Miruna Daniela Popescu**
Affiliation:
* Astronomical Institute of the Romanian Academy, Str. Cuşitul de Argint 5, RO-75212 Bucharest 28, Romania
E-mail: gmaris@aira.astro.ro
** Armagh Observatory, North Ireland E-mail: mdp@star.arm.ac.uk
E-mail
Keywords:
Abstract:
We present a review of solar flare behaviour over the 11-yr cycles, together with an analysis of the effects they may have on other solar activity and geomagnetic indices.
Our analysis includes a statistical investigation of flare occurence and N-S hemispheric distribution over the last seven solar cycles (no. 17 - 23).
Moreover, we try to estimate if there is any connection between the flare activity and the strength of solar cycles, and if flares bring any contribution to the total solar irradiance variation.
For that purpose, we studied not only the number of flares occuring monthly and annually, but we also defined an index that estimates the energy emitted by flares in the 1-8 A range.
Flare correlation with the geomagnetic storms induced on Earth will be described as well.
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