Bastille Day Flare

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The Bastille Day Flare at the 19.5 nm wavelength, as recorded by the Extreme ultraviolet Imaging Telescope instrument on the SOHO spacecraft
The Bastille Day Flare at the 19.5 nm wavelength, as recorded by the Extreme ultraviolet Imaging Telescope instrument on the SOHO spacecraft

The Bastille Day Flare or Bastille Day Event was a powerful solar flare on July 14, 2000 occurring near the peak of the solar maximum. Active region 9077 produced an X5-class flare, which caused an S3 radiation storm on Earth fifteen minutes later as energetic protons bombarded the ionosphere. The proton event was four times more intense than any previously recorded. The flare was followed by a full-halo coronal mass ejection.

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