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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Relativistic electron acceleration during HILDCAA events: are precursor CIR magnetic storms important?

Fig. 6

Superposed time series of solar wind-magnetosphere energy parameters during HILDCAA events. From top to bottom, the panels are the solar wind kinetic power (U sw in 1011 W), the solar wind-magnetosphere energy coupling function (ε* in 1011 W), the rates of Joule heating (U J in 1011 W), auroral precipitation (U A in 1011 W), and ring current injection energy (U R in 1011 W). The bottom two panels are the SYM-H (nT) and AE (nT) indices. The red and blue curves correspond to isolated HILDCAAs (H) and CIR storm-preceded HILDCAAs (SH), respectively. The zero epoch time (indicated by the vertical line) corresponds to the initiation time of the HILDCAA events. The time axis is in the unit of 1 day. The numbers in the brackets in the title indicate the total number of H- and SH-events for the superposed epoch analyses

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