Turkish Journal of Physics
Abstract
Two x-ray solar flare parameters (number of flares and peak flux) are compared to geomagnetic and space weather activity indices. The first solar flare parameter, X-ray solar flare number (SFN), is the total number of solar flares observed in a given month. The second one is the monthly maximum of X-ray solar flare peak fluxes (SFP). In order to compare these two parameters, both of them are cross-correlated with some other indices of geomagnetic activity (aa, Dst, and AE indices) and space weather (maximum coronal mass ejection speed index and solar wind speed). Maximum correlation was found ($\sim $0.63) between both flare time series (SFN and SFP) and maximum coronal mass ejection speed index with no lag. Our results show that X-ray solar flare peak flux better describes those geomagnetic and space weather activity indices than X-ray solar flare numbers. This is mostly because of high time delays between flare numbers and studied indices.
DOI
10.3906/fiz-1712-18
Keywords
Solar flares, coronal mass ejections, geomagnetic indices, solar wind, cross-correlation
First Page
283
Last Page
292
Recommended Citation
SARP, VOLKAN and KILÇIK, ALİ
(2018)
"Solar flare and geomagnetic activity relations,"
Turkish Journal of Physics: Vol. 42:
No.
3, Article 6.
https://doi.org/10.3906/fiz-1712-18
Available at:
https://journals.tubitak.gov.tr/physics/vol42/iss3/6
