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Solar Activity Report for 9/3/03

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  • David
    The current coronal hole encounter has been something of a non-event. The solar wind speed peaked at about 550 km/sec, and has been holding in the low 500 s
    Message 1 of 1 , Sep 3, 2003
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      The current coronal hole encounter has been something of a non-event.
      The solar wind speed peaked at about 550 km/sec, and has been holding
      in the low 500's for the last 48 hours. I had expected to see a
      stronger spike in the solar wind speed, but apparently not this time
      around. A persistent north-pointing Interplanetary Magnetic Field
      (IMF) has served to keep down any significant geomagnetic activity.
      Such as it is, the elevated solar wind speed is expected to continue
      for about the next two days before slowing down. None of the four
      numbered sunspot regions visible appear to have the potential for
      producing a significant flare at the present time.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 74
      SFI : 111
      A index : 19
      K index : 3

      Solar wind speed : 531.1 km/sec
      Solar wind density : 3.6 protons/cc
      Solar wind pressure : 1.6 nPa

      IMF : 9.6 nT
      IMF Orientation : 5.4 nT North

      Conditions for the last 24 hours :
      No space weather storms were observed for the past 24 hours.

      Forecast for the next 24 hours :
      No space weather storms are expected for the next 24 hours.

      Solar activity forecast :
      Solar activity is expected to be very low to low, with C-class flares
      possible from Region 450 (S16W07).

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to active. Isolated
      minor storm conditions days one and two are possible from a high speed
      solar wind stream.

      Recent significant solar flare activity :
      None
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