Bastille Day event

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For other uses, see Bastille Day (disambiguation).

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 in solar cycle 23.[1][2] Active region 9077 produced an X5.7-class flare, which caused an S3 radiation storm on Earth fifteen minutes later as energetic protons bombarded the ionosphere.[1][3] It was the biggest solar radiation event since 1989.[3] The proton event was four times more intense than any previously recorded since the launches of SOHO in 1995 and ACE in 1997.[1] The flare was followed by a full-halo coronal mass ejection[1] and a geomagnetic super storm on July 15–16. The extreme level, G5, was peaked in late hours of July 15

The Bastille Day event was observed by Voyager I and Voyager II.[4]

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References[edit]

  1. ^ a b c d "Space Radiation Storm". NASA. 2004-07-14. Retrieved 2007-03-09. 
  2. ^ Associated Press (2000-07-14). "NASA Says Solar Flare Caused Radio Blackouts". The New York Times. Retrieved 2007-03-09. 
  3. ^ a b Roylance, Frank D. (2000-07-15). "Solar flare biggest since '89". Contra Costa Times. Retrieved 2007-03-09. 
  4. ^ [1] Webber, W. R., F. B. McDonald, J. A. Lockwood, and B. Heikkila (2002), The effect of the July 14, 2000 "Bastille Day" solar flare event on >70 MeV galactic cosmic rays observed at V1 and V2 in the distant heliosphere, Geophys. Res. Lett., 29, 10, 1377-1380, doi:10.1029/2002GL014729.

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