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Solar flare particle environment on 4-9 November 1997

The large solar event on 4-9 November 1997 was observed by the GOES-9 spacecraft in seven proton integral flux channels ranging from >1 MeV to >100 MeV. In the following, the measured proton spectra are given both as plots and as tables in two-day periods (4-5, 6-7 and 8-9 November). The tabulated data starts at 00.00 for each of the three sets, is given in 5 minute intervals, and contain the following columns:

Column 1:>1 MeV proton flux (1/cm2/s/sr)
Column 2:>5 MeV proton flux (1/cm2/s/sr)
Column 3:>10 MeV proton flux (1/cm2/s/sr)
Column 4:>30 MeV proton flux (1/cm2/s/sr)
Column 5:>50 MeV proton flux (1/cm2/s/sr)
Column 6:>60 MeV proton flux (1/cm2/s/sr)
Column 7:>100 MeV proton flux (1/cm2/s/sr)

The plots contain also >2 MeV electron data, but these are partly missing on 6 November, presumably due to pile-up in the detector caused by the high fluxes.

4-5 Nov, 1997 plot table
6-7 Nov, 1997 plot table
8-9 Nov, 1997 plot table

We have additionally translated these integral fluxes into differential proton fluxes as a function of time. A JPEG movie (~4 MB, ActiveMovie 2.0) of this data has been constructed by H. Evans (ESTEC), and can be downloaded here. Note the two separate surges on November 4 and 6, and especially on November 6 the onset of, first ~100 MeV protons, and afterwards, lower-energy ~10 MeV protons.

For more data, please access the GOES home page.

The high-energy particle emission from this solar event was also detected by several neutron monitors. Preliminary data from Moscow, Tixie Bay, and Apatity stations have been provided to us by the IZMIRAN Cosmic Ray Department in Moscow, and are shown in the TEC-EES Solar Energetic Proton Events WWW page.

For questions, comments, and further information, contact P. Nieminen at ESA/ESTEC.

 

 

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