Fig. 4From: Model-based reproduction and validation of the total spectra of a solar flare and their impact on the global environment at the X9.3 event of September 6, 2017TEC observations at 0°E 25–75°N. (Top left) Averaged TEC from September 1 to 10, 2017. This is the background. (Top right) TEC on September 6, 2017. (Bottom) Ratio of TEC from flare (top-right figure) and the background (top-left figure). TEC significantly increases at any latitude when flare occursBack to article page