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In order to clarify characteristics of equatorial Pc5 pulsations for seasonal and magnetospheric activity variation (Kp index to evaluate magnetospheric disturbance), we analyzed geomagnetic field dat...a obtained from Ile-Ife Station in Nigeria. We found that the dayside equatorial Pc5 has high occurrence during equinox period in comparison to solstice periods. The occurrence of dayside equatorial Pc5 depends on season variation, while it is indecisive for relationship between equatorial Pc5 and Kp index. Also the amplitude, period, and duration of equatorial Pc5 have no dependence on both seasonal variation and Kp index.続きを見る
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