blue flashes

A form of blue flash — A very rare phenomenon observed in the morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

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Meanings

noun
  1. pluralplural of blue flash
Cite this entry
APA

blue flashes. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/blue%20flashes

MLA

“blue flashes.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/blue%20flashes. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “blue flashes,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/blue%20flashes.

Source: blue flashes on Wiktionary, CC BY-SA 4.0.