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Fig. 8 | Earth, Planets and Space

Fig. 8

From: On using a double-thin-shell approach and TEC perturbation component to sound night-time mid-latitude E–F coupling

Fig. 8

Time variation of TECPs on 23 June 2012 (DOY 175) along the northeast–southwest red dashed in Fig. 1. \({H}_{eq}\) is the equatorial crossing height of the magnetic field line piercing each shell. The top and bottom panels represent E- and F-shells, respectively. The black and gray dashed lines represent the occurrence time of perturbations and the alignment of evident downward-sloping stripes, respectively. Evident, particularly between 20:00 ~ 23:59 JST, is the southwestward propagating wavefronts in both E- and F-region

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