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Solar Activity Report for 9/13/03

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  • David
    That Earth is exiting the high speed solar wind stream it has been inside of for the last few days. Other than a short period of G-1 geomagnetic storm
    Message 1 of 1 , Sep 13, 2003
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      That Earth is exiting the high speed solar wind stream it has been
      inside of for the last few days. Other than a short period of G-1
      geomagnetic storm conditions that triggered some aurora that were
      spotted in Alaska and northern Canada, there wasn't much geomagnetic
      activity associated with it due to a persistent north-pointing
      Interplanetary Magnetic Field. A north-pointing IMF has the effect of
      diminishing geomagnetic activity, whereas a south pointing IMF will
      enhance it. There was a long-duration B-class flare on Friday caused
      by two disappearing filaments. SOHO LASCO imagery shows a weak,
      partial-halo CME being created by the event. While the effect caused
      by its arrival shouldn't be particularly pronounced, we could see some
      increased geomagnetic activity in 24 to 36 hours. There's another
      coronal that has rotated into view. Look for a return of high solar
      wind speeds along about the 19th.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 57
      SFI : 96
      A index : 11
      K index : 2

      Solar wind speed : 437.5 km/sec
      Solar wind density : 2.1 nPa
      Solar wind pressure : 0.6 nPa

      IMF : 5.5 nT
      IMF Orientation : 1.8 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 at very low to low levels. Region 456
      has the potential for C-class activity and a slight chance of an
      isolated M-class flare.

      Geomagnetic Activity Forecast :
      The geomagnetic field is expected to be at quiet to unsettled levels
      on day one of the forecast period. Weak CME effects are possible on
      day two and day three with quiet to active levels expected.

      Recent significant solar flare activity :
      None
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