Analysis of the Solar Flare Index for Solar Cycles 18 – 24: Extremely Deep Gnevyshev Gap in the Chromosphere

被引：0
|
作者：
Jouni Takalo
机构：
[1] University of Oulu,Space Physics and Astronomy Research Unit
来源：
Solar Physics | 2023年 / 298卷
关键词：
Solar flare; Solar cycles; SFI; Ap-index; IMF; Cross-correlation; PCA; T-test;
D O I：
暂无
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学科分类号：
摘要：
We study the solar flare index (SFI) for the Solar Cycles 18 – 24. We find that SFI has deeper Gnevyshev gap (GG) in its first principal component than other atmospheric parameters. The GG is extremely clear especially in the even cycles.
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