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Example Solar Proton Event Data

Example Solar Proton Event Data. NASA JSC August 30, 2006. Times of Occurrence of Large SPE’s. Recent Era (1550-2000) McKracken et al. Modern Era (1956-2005). Projections of Cycles and Mean Occurrence Frequency of SPE. Large Solar Proton Events during Solar Cycles 19-23

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Example Solar Proton Event Data

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  1. Example Solar Proton Event Data NASA JSC August 30, 2006

  2. Times of Occurrence of Large SPE’s Recent Era (1550-2000) McKracken et al. Modern Era (1956-2005)

  3. Projections of Cycles and Mean Occurrence Frequency of SPE

  4. Large Solar Proton Events during Solar Cycles 19-23 with F30 > 109 protons/cm2 (a) F30 for solar cycle 19-21: data taken from Shea and Smart. (b) F30 for solar cycle 22 and 23: calculated using corrected 5-min average proton flux of GOES measurements. Note 1: There are large differences in the estimate of fluence in November 1960 SPE. Data given by others are significantly smaller than this value (1.3 x 109 protons/cm2 by Freier and Webber). Note 2: F30 for the combined 3 major peaks occurred during 10/26-11/6/2003: 3.42 x 109 protons/cm2. Note 3: one day later on July 11, 1959 Note 4: in the same day on February 23, 1956

  5. Proton Integral Flux August 2-11, 1972 SPE

  6. BFO Dose Rate August 2-11, 1972 SPE

  7. BFO Cumulative Dose August 2-11, 1972 SPE

  8. 82 BFO Locations ● 32 location set ● 50 location set

  9. Hourly-Averaged Proton Integral Flux during Oct 26 - Nov 6, 2003 SPE

  10. BFO Dose Rate during Oct 26 - Nov 6, 2003 SPE

  11. Hourly-Averaged Proton Integral Flux Oct 26 - Nov 6, 2003 SPE

  12. BFO Dose Rate October 26- November 6, 2003 SPE

  13. BFO Cumulative Dose October 26- November 6, 2003 SPE

  14. Hourly-Averaged Proton Integral Flux January 16-22, 2005 SPE

  15. BFO Dose Rate January 16-22, 2005 SPE

  16. BFO Cumulative Dose January 16-22, 2005 SPE

  17. Large SPEIntegral Fluence Spectra at 1AU

  18. Was Carrington Event (1859) Lethal?1859 event has largest F>30 Flux known Conditions under Apollo Spacecraft -type shielding Ice-Core data -F>30MeV flux from 1450-1990

  19. SPE Probability in 1-Week Mission and BFO Exposure Level inside a Typical Equipment Room in Free Space

  20. Frequency of SPE Occurrence in 3-Month Periods F30 > 108 protons/cm2for Solar Cycle 21. Dec 1982 Apr 1981 Apr 1984 Apr 1978 Jan 1982 Feb 1978 Sept 1978 Sept 1979 Oct 1981

  21. Frequency of SPE Occurrence in 3-Month Periods F30 > 109 protons/cm2for Solar Cycle 22. Sept 1989 Oct 1989 Aug 1989 Mar 1991

  22. Frequency of SPE Occurrence in 3-Month Periods F30 > 109 protons/cm2for Solar Cycle 23. Nov 2001 Nov 2000 Jul 2000 Oct 2003 Jan 2005

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