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Solar Activity Report for 9/5/03

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  • David
    After languishing in the mid-500 km/sec range, the solar wind speed suddenly spiked at well over 600 km/sec on Thursday, and remains over 600 this evening.
    Message 1 of 1 , Sep 5, 2003
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      After languishing in the mid-500 km/sec range, the solar wind speed
      suddenly spiked at well over 600 km/sec on Thursday, and remains over
      600 this evening. However, geomagnetic activity has been minimal due
      to a persistent north-pointing Interplanetary Magnetic Field. The
      elevated solar wind speeds are expected to last another day before
      slowing down. After that, there will be about a three day period
      before the western part of the current coronal hole comples rotates
      into an Earth-pointing position, and the solar wind speeds will rise
      again. Solar activity is low, and none of the four numbered sunspot
      regions visible appear to have any significant flare-generating
      potential at this time.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 57
      SFI : 108
      A index : 14
      K index : 3

      Solar wind speed : 619.6
      Solar wind density : 1.0 protons/cc
      Solar wind pressure : 0.7 nPa

      IMF : 4.7 nT
      IMF Orientation : 3.5 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 continue at low levels. Occasional low
      C-class flares are likely from Region 453.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at predominantly unsettled to
      active levels through day one as the current high speed stream
      subsides. Quiet to unsettled levels are expected on day two before the
      onset of a recurrent coronal hole on day three. Expect occasional
      active periods as this coronal hole moves into a geoeffective position.

      Recent significant solar flare activity :
      None
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