The 158-day periodicity in the rising phase of cycle 23
Abstract
A near 158-day periodicity was discovered in the solar flare occurrence rate during solar cycle 21. It has later become clear that this periodicity was caused by the periodic emergence of magnetic flux that gave rise to the formation of sunspot groups with complex magnetic topology. The magnetic complexity of sunspot groups in turn leads to a suitable scenario for the occurrence of energetic flares by means of periodic episodes of magnetic reconnection. In this work, various solar activity indicators are used to study the presence of the 158-day periodicity during the rising phase of solar cycle 23.
- Publication:
-
Solspa 2001, Proceedings of the Second Solar Cycle and Space Weather Euroconference
- Pub Date:
- March 2002
- Bibcode:
- 2002ESASP.477..155O
- Keywords:
-
- Solar Activity Cycles