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Solar Activity Report for 9/13/02

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  • David
    September has been a good month for aurora. Three different geomagnetic storms have ignited aurora displays, and aurora have been seen as far south as North
    Message 1 of 1 , Sep 13, 2002
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      September has been a good month for aurora. Three different
      geomagnetic storms have ignited aurora displays, and aurora have been
      seen as far south as North Carolina. Be sure to check out the photo
      galleries at http://www.spaceweather.com/ for pictures of the aurora
      that were photographed on Sept 4, 7, and 11. The Earth is still
      inside of a high-speed solar wind stream this evening, although that
      should start subsiding tomorrow. Sunspot region 105 has been quiet
      the last couple of days, but a major flare from this large sunspot is
      possible. Sunpot region 107 could produce at least an M-class flare
      as well.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 246
      SFI : 206
      A index : 18
      K index : 2

      Solar wind speed : 444.8 km/sec
      Solar wind density : 2.3 protons/cc
      Solar wind pressure : 0.7 nPa

      IMF : 7.1 nT
      IMF Orientation : 3.7 nT South

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

      Forecast for the next 24 hours :
      Space weather for the next 24 hours is expected to be minor. Radio
      blackouts reaching the R1 level are expected.

      Solar Activity Forecast :
      Solar activity is expected to be at low to moderate levels. M-class
      activity remains possible from regions 105 and 107.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at quiet to active levels
      through the first day of the period as the coronal hole high speed
      stream effects subside. A return to quiet to unsettled conditions are
      expected for the remainder of the forecast period. Greater than 2 MeV
      flux at geosynchronous orbit may be elevated into day one of the
      period.

      Recent significant solar flare activity :
      11-Sep-2002 0735Z M2.2
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