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Observations of Hysteresis Between Flare Index and Some Solar Indices

Published online by Cambridge University Press:  13 May 2016

A. Özgüç  and
T. Ataç
A. Özgüç
Affiliation:
Boĝaziçi University, Kandilli Observatory and Earthquake Research Institute, Cengelköy, Istanbul, Turkey
T. Ataç
Affiliation:
Boĝaziçi University, Kandilli Observatory and Earthquake Research Institute, Cengelköy, Istanbul, Turkey

Abstract

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Using flare index data sets for solar cycles 21 and 22 we find that flare index and some solar activity indicators show a hysteresis phenomenon. It is observed that total sunspot area, mean magnetic field and coronal index follow different paths for the ascending and descending phases of the solar cycles while saturation effect exists at the extreme phases. However, we notice that the separations between the paths are not the same during the past two cycles of 21 and 22.

Type
Session I: Global Structure and Evolution of the Solar Interior
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 125 - 128
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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