Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23

Details Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23 Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009soph..255..155k&link_type=abstract

Solar Physics, Volume 255, Issue 1, pp.155-162

Physics

8

Flares, Short Periodicities, Sunspot Activity

Scientific paper

The short-term periodicities in sunspot numbers, sunspot areas, and flare index data are investigated in detail using the Date Compensated Discrete Fourier Transform (DCDFT) for the full disk of the Sun separately over the rising, the maximum, and the declining portions of solar cycle 23 (1996 - 2006). While sunspot numbers and areas show several significant periodicities in a wide range between 23.1 and 36.4 days, the flare index data do not exhibit any significant periodicity. The earlier conclusion of Pap, Tobiska, and Bouwer (1990, Solar Phys. 129, 165) and Kane (2003, J. Atmos. Solar-Terr. Phys. 65, 1169), that the 27-day periodicity is more pronounced in the declining portion of a solar cycle than in the rising and maximum ones, seems to be true for sunspot numbers and sunspot area data analyzed here during solar cycle 23.

Affiliated with

Also associated with

No associations

Rating

Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short-Term Periodicities in Sunspot Activity and Flare Index Data during Solar Cycle 23 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1732433