It has been observed that after major solar storms, an emission of light with a wavelength of 557.7 nm (the oxygen green line) occurs across the entire upper atmosphere of Venus.
ɪt hˈæzbiːn əbzˈɜːvd ðæt ˈæftɚ mˈeɪdʒɚ sˈoʊlɚ stˈoːɹmz, ɐn ɪmˈɪʃən ʌv lˈaɪt wɪð ɐ wˈeɪvlɛŋθ ʌv fˈaɪvhˈʌndɹɪd fˈɪfti sˈɛvən.sˈɛvən ˌɛnˈɛm ðɪ ˈɑːksɪdʒən ɡɹˈiːn lˈaɪn əkˈɜːz əkɹˌɑːs ðɪ ɛntˈaɪɚɹ ˌʌpɚɹ ˈætməsfˌɪɹ ʌv vˈiːnəs.