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the claim
Ultraviolet rays from sunlight in the upper atmosphere of Earth can knock electrons off gas molecules to create the ionosphere.
the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against
Is it true that ultraviolet rays from sunlight in the upper atmosphere of Earth can knock electrons off gas molecules to create the ionosphere?
Yes. Ultraviolet and extreme ultraviolet radiation from the sun ionize gases in Earth's upper atmosphere to form the ionosphere.
Verdict: SUPPORTED · 2 sources for, 0 against · Last checked
The analysis
The retrieved papers, particularly solar observation reviews like Woods et al. (2026), directly affirm that solar EUV radiation creates the ionosphere. No papers refute this well-established physical mechanism.
Evidence for · 2
This paper notes that solar EUV radiation creates the ionosphere in Earth's upper atmosphere.
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TN, W., PC, C., A, J., JP, M., L, Q., HP, W., D, W., R, B., FG, E., & G, G. (2026). Revealing Flare Energetics and Dynamics with SDO EVE Solar Extreme Ultraviolet Spectral Irradiance Observations.. doi.org. https://doi.org/10.1007/s11207-026-02650-0
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More for · 1
This paper discusses photoelectron production and solar EUV flux measurements relevant to ionospheric formation.
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Richards, P. G. & Torr, D. G. (1984). An investigation of the consistency of the ionospheric measurements of the photoelectron flux and solar EUV flux. doi.org. https://doi.org/10.1029/ja089ia07p05625
What does the evidence say?
The retrieved papers, particularly solar observation reviews like Woods et al. (2026), directly affirm that solar EUV radiation creates the ionosphere. No papers refute this well-established physical mechanism.
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