Periodicities in the occurrence of Solar Flare, Coronal Mass Ejection and Sunspot Area in Solar Cycle 23-24
Abstract
In order to investigate the relationship between magnetic flux emergence, solar flares and Coronal Mass Ejection (CME), we study the periodicity in the time series of these quantities. It has been known that solar flares, sunspot area and photospheric magnetic flux have a dominant periodicity of about 155 days. However, the time-period relationship obtained using a Morlet wavelet shows that the periodicity is confined to a part of solar cycle and is non repeating. We present the time series analysis of sunspot area, flare and CME occurrence during cycle 23 and the rising phase of cycle 24 from 1996 to 2011. We find that the flux emergence has multiple periodicities. Flares and CMEs, however, do not occur with the same period as the flux emergence. Using the results of this study, we discuss the possible activity sources producing emerging flux.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSH43B2174C
- Keywords:
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- 7519 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Flares;
- 7536 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Solar activity cycle;
- 7999 SPACE WEATHER / General or miscellaneous