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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 4 | Geoscience Letters

Fig. 4

From: Long-term variations in the plasma sheet ion composition and substorm occurrence over 23 years

Fig. 4

a Mg II index that is identical to Fig. 2a. b Daily number of Pi2 pulsations observed at Kakioka at 2100–0100 magnetic local time for 1992–2015. The number is averaged over 27 days in the same way as the integral fluxes and the Mg II index. c Daily number of Pi2 pulsations at Kakioka with no clear jumps in solar wind dynamic pressure and IMF Bz, which are considered non-triggered events

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