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Figure 5 | Earth, Planets and Space

Figure 5

From: Long-term variation in the upper atmosphere as seen in the geomagnetic solar quiet daily variation

Figure 5

Correlation between the solar F10.7 index and Sq amplitudes. Correlation between the solar F10.7 index and Sq amplitudes obtained at Addis Ababa (AAE) (a), Guam (GUM) (b), Kakioka (KAK) (c), San Juan (SJG) (d), Chambon-La-Foret (CLF) (e), and Niemegk (NGK) (f). The green and red lines in each panel indicate the linear regression line and the second-order least-square fitted curve, respectively. The coefficients of determination R1 and R2 of the linear regression line and the second-order least-square fitted curve are shown in the right bottom of each panel. The Sq amplitude tends to be enhanced for the large values of the solar F10.7 index.

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