Statistical analysis for EUV dynamic spectra and their impact on the ionosphere during solar flares

Abstract The X-rays and extreme ultraviolet (EUV) emitted during solar flares can rapidly change the physical composition of Earth’s ionosphere, causing space weather phenomena. It is important to develop an accurate understanding flare emission spectra understand how it affects ionosphere. We reproduced entire spectrum using empirical model physics-based model, input into atmospheric GAIA calculate total electron content (TEC) enhancement due emission. compared statistics nine events calculated TEC enhancements with corresponding observed data. used in this study was able estimate a correlation coefficient greater than 0.9. results indicate that determined by soft X-ray EUV wavelengths shorter 35 nm. found be largely line emissions wavelengths, such as Fe XVII 10.08 nm, XIX 10.85 nm He II 30.38 Graphical