Figure 12

The relative change of EUV and dayside average change in the thermosphere. (a) The relative change of EUV at 30 to 35 nm during the solar flare. The solid line, the dashed line, and the dotted line refer to the EUV variation with normal duration, double duration, and dotted duration, respectively. Dayside average change in thermospheric density (b) and temperature (c) at 400 km.