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Solar Activity Report for 9/9/03

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  • David
    The Earth has entered a high speed coronal hole solar wind stream, and the solar wind speed has topped the 600 km/sec mark. So far, there hasn t been much in
    Message 1 of 1 , Sep 9, 2003
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      The Earth has entered a high speed coronal hole solar wind stream, and
      the solar wind speed has topped the 600 km/sec mark. So far, there
      hasn't been much in the way of geomagnetic activity, as the
      Interplanetary Magnetic Field has stayed either north-pointing or
      close to neutral. This continues the trend that prevailed during the
      last coronal hole encounter. It could change at any time, however, so
      stay tuned. There were two impressive CME's that erupted off of the
      southwestern limb of the solar disk on the 7th and 8th. We might get
      a glancing blow from them sometime on Wednesday. If that happens,
      activity could pick up. Only a single sunspot region is visible this
      evening, and it doesn't appear to have the potential for producing a
      significant flare at this time.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 43
      SFI : 96
      A index : 22
      K index : 4

      Solar wind speed : 609.4 km/sec
      Solar wind density : 2.8 protons/cc
      Solar wind pressure : 1.5 nPa

      IMF : 7.8 nT
      IMF Orientation : 0.5 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.
      Geomagnetic storms reaching the G1 level are expected.

      Solar activity forecast :
      Solar activity is expected to remain at very low levels.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at unsettled to active levels
      through day one of the forecast period due to a favorably positioned
      coronal hole. Activity on day one may be further enhanced due to a
      possible transient passage resulting from the C5 flare activity seen
      on 7 September. Days two and three should see a return to
      predominantly unsettled conditions as the recurrent coronal hole wanes.

      Recent significant solar flare activity :
      None
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