Fig. 5.
Temporal variations of κ of normalized spectra in the F regions at velocities higher than 2500 km s−1. The upper panel shows the SIR events that exhibit continuous power laws in both F and F′ regions in Figs. 3 and 4, while the other events with turnover spectra at velocities lower than 2500 km s−1 are given in the lower panel.
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