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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

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

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
Revealing Flare Energetics and Dynamics with SDO EVE Solar Extreme Ultraviolet Spectral Irradiance Observations.
2026
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
An investigation of the consistency of the ionospheric measurements of the photoelectron flux and solar EUV flux
1984
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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