Fig. 2
Observational coverage over AR8253 by TRACE 171 Å (red) and 195 Å (blue), and NoRH 17 GHz (green) in the analysed time interval. Small gaps in EUV observations of order 100 s are due to channel switching, and large ones are due to routine observations on the solar limb (including polar regions), re-pointing or to avoid radiation belts.
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