Recurrent Events’ Impacts on foF2 Diurnal Variations at Dakar Station during Solar Cycles 21-22

Table 1

Recurrent events’ positive storms strength on foF2 variation by solar phase and by season.

Storm strength over solar phases	Minimum	Increasing	Maximum	Decreasing
(MHz)	0.64	0.88	0.61	1.38
Storm strength over seasons	Spring	Summer	Autumn	Winter
(MHz)	1.18	0.33	0.76	0.93