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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.^[1][2] 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.^[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]

The Bastille Day event was observed by Voyager I and Voyager II, thus it is the farthest out observed solar storm.

References

1. ^ ^{a b c d} "Space Radiation Storm". NASA. 2004-07-14. http://science.nasa.gov/headlines/y2000/ast14jul_2m.htm. Retrieved 2007-03-09. 
2. ^ Associated Press (2000-07-14). "NASA Says Solar Flare Caused Radio Blackouts". The New York Times. http://docs.newsbank.com/openurl?ctx_ver=z39.88-2004&rft_id=info:sid/iw.newsbank.com:AWNB:NYTB&rft_val_format=info:ofi/fmt:kev:mtx:ctx&rft_dat=10192EC724742FDF&svc_dat=InfoWeb:aggregated4&req_dat=0D0CB57AB53DF815. Retrieved 2007-03-09. 
3. ^ ^{a b} Roylance, Frank D. (2000-07-15). "Solar flare biggest since '89". Contra Costa Times. http://docs.newsbank.com/openurl?ctx_ver=z39.88-2004&rft_id=info:sid/iw.newsbank.com:AWNB:CCYB&rft_val_format=info:ofi/fmt:kev:mtx:ctx&rft_dat=1064A3E55B815DA8&svc_dat=InfoWeb:aggregated4&req_dat=0D0CB57AB53DF815. Retrieved 2007-03-09. 

External links

• Views of the 'Bastille Day' Sun, July 2000. (pictures)
• 'Bastille Day' Flare Animations
• Propagation of Bastille Day Event to Voyagers 1 & 2
• High-Energy Ions Energized by Bastille Day 2000 Shock Bombardment
• Ulysses Observations of Solar Energetic Particles From the Bastille Day Event