The claim

“"NASA confirmed in 2024 that the solar eclipse will cause a nationwide communications blackout."”

NASA and other expert sources did not confirm any nationwide communications blackout from the eclipse; the claim is a recurring viral hoax.

Total solar eclipses do not create a U.S.-wide communications blackout; they briefly reduce sunlight along a narrow path and can affect local conditions (e.g., temperature and some radio propagation changes), but not shut down communications nationwide. NASA’s eclipse materials focus on viewing safety and science opportunities and do not warn of a nationwide blackout. NOAA notes that eclipses can cause temporary, localized changes in the ionosphere that may slightly affect some radio frequencies, which is different from an all-communications failure. Fact-checkers and cybersecurity/hoax references have repeatedly debunked “NASA blackout” eclipse claims as misinformation that resurfaces around major eclipses.