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Table 1 Year and month of the dusk-side IHFAC suggested by the Fukushima model

From: Seasonal variation of inter-hemispheric field-aligned currents deduced from time-series analysis of the equatorial geomagnetic field data during solar cycle 23–24

Periods Fukushima model type Non-Fukushima model type
1999–2001 December solstice March–November
2002–2018 June/December solstices March/September equinoxes
2019 June solstice October–April