Solar Cycle 20

Solar Cycle 21

Maximum du cycle

Minimum du cycle

Maximum du cycle

Minimum du cycle

Seasons

W

Sg

S

Au

W

Sg

S

Au

W

Sg

S

Au

W

Sg

S

Au

Ouagadougou

foF2 (MHz)

12.36

12.27

11.01

12.42

8.83

8.94

8.02

8.62

13.68

13.83

11.59

14.02

8.13

9.56

7.52

8.94

Manila

foF2 (MHz)

12.88

12.51

11.42

13.13

8.83

10.30

8.81

9.88

14.02

13.54

12.20

14.40

8.76

8.68

8.97

9.59