Summary: Multi­Wavelength Investigations of Solar Activity
Proceedings IAU Symposium No. 223, 2004
A.V. Stepanov, E.E. Benevolenskaya & A.G. Kosovichev, eds.
c
# 2004 International Astronomical Union
DOI: 00.0000/X000000000000000X
Solar cycle 23 analysis
Georgeta Mari›s 1 , Miruna Daniela Popescu 1,2
and Diana Be›sliu 1
1 Astronomical Institute of the Romanian Academy Str. Cutitul de Argint 5, RO­040558 1
Bucharest, Romania e­mail: gmaris@aira.astro.ro
2 Armagh Observatory, College Hill, Armagh, BT61 9DG, N. Ireland email: mdp@arm.ac.uk
Abstract. We analyse the solar cycle (SC) 23 behavior. We also make a comparison with some
previous cycles and present a few aspects concerning the forecasts made for SC 23 maximum.
As regards the following cycle, in accordance to other early predictions, our empirical method,
based on observing the flare energy release during the descendant phase of the precedent SC,
estimate that the amplitude of SC 24 will be low.
1. Previous forecasts and a short review of SC 23
A large range of forecasting methods is used to predict the occurrence and ampli­
tude of SCs. They have changed from simple statistical (nonlinear) to complex physical

Source: Armagh Observatory

Collections: Physics