| During the last week, solar activity was very low to high. Eleven sunspot regions were on the visible disk ( AR2924-AR2934) with three M-class flares and 20 C-class flares produced. Due to the influence of the M5.5 flare on 20 Jan, the greater than 10 MeV proton flux at geosynchronous orbit reached minor solar proton event on 20 Jan. The F10.7 index ranged from 99 sfu to 116 sfu. Due to the effect of the coronal hole high speed stream, the solar wind speed reached a peak of about 620 km/s on 14-16 Jan. The geomagnetic field reached mediun storm levels for 3 hours, minor storm levels for 6 hours and active levels for 12 hours, respectively. Due to the effect of the coronal mass ejections produced on 14-15 Jan, the solar wind speed reached a peak of about 680 km/s on 18-19 Jan. The geomagnetic field reached mediun storm levels for 3 hours, minor storm levels for 6 hours and active levels for 3 hours, respectively. The geomagnetic field was quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 18-20 Jan. |
