Solar activity was very low. There were no flares in the past 24 hours. The solar disk was devoid of spots for most of the day, but towards the end of the period there was evidence for a new active region (or regions) rotating on the disk at latitudes S10-S15, near the location where old Region 536 would be expected.

Solar activity is expected to be very low. There should be a slow rise in background levels as the new active region (or regions) rotate into view.

The geomagnetic field ranged from unsettled to minor storm levels. Solar wind velocity showed a gradual increase beginning around 0100 UTC, and this was accompanied by frequent fluctuations in the interplanetary Bz component in the range of about -7 nT to +7 nT. These signatures together with a consistent 'away' polarity in the solar phi angle all suggest that the activity was driven by favorably positioned positive polarity coronal hole. The greater than 2 MeV electron fluxes were at high levels during the past 24 hours.

The geomagnetic field is expected to be unsettled with occasional active periods for the next two days (29-30 January). An increase to unsettled to active is expected on the third day (31 January) as another coronal hole rotates into favorable position.

  觀測的       28 Jan 089
  預測的   29 Jan-31 Jan  100/105/105
  90天平均值        28 Jan 126

  觀測的 Afr/Ap 27 Jan  013/016
  估算值     Afr/Ap 28 Jan  015/019
  預測的    Afr/Ap 29 Jan-31 Jan  010/015-010/015-010/020