| During the last week, solar activity was low to high with high levels on 9-11 Nov, moderate levels on 7 Nov, low for the rest of time. Ten active sunspot regions (AR4272-AR4281) were on the visible disk with 3 X-class flares and 3 M-class flares produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the level of a minor solar proton event at 11:25 on 10 Nov. It reached the moderate solar proton event level at 12:25 on 11 Nov and increased to the major solar proton event level at 01:45 on 12 Nov, with the maximum proton flux reaching 1460 pfu. This event ended at 16:50 on 13 Nov. The F10.7 index ranged between 163 sfu and 180 sfu. Due to the effects of the CME on 5 Nov and the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 850 km/s on 7-8 Nov, and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 15 hours and active levels for 9 hours. Due to the effect of the CMEs on 9-11 Nov, the solar wind speed reached a peak value of 960 km/s, and the geomagnetic field reached severe storm levels for 3 hours, major storm levels for 15 hours, moderate storm levels for 6 hours, minor storm levels for 12 hours and active levels for 6 hours. The geomagnetic field was at quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 11 Nov. |
