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Solar Activity Report for 4/6/03

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  • David
    The solar wind speed has dropped below the 400 km/sec mark, giving a pause in the geomagnetic activity before the solar wind speeds start increasing again in a
    Message 1 of 1 , Apr 6, 2003
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      The solar wind speed has dropped below the 400 km/sec mark, giving a
      pause in the geomagnetic activity before the solar wind speeds start
      increasing again in a day or two. There is a medium-sized coronal
      hole that is rotating into an Earth-pointing position that's going to
      provide the solar wind gusts for the next round activity, which is
      expected to start on the 8th or 9th. The solar wind speed is on the
      decline for the time being, as two sunspot regions, 321 and 324, are
      now rotating out of view over the western limb of the solar disk.
      They may still get off a parting shot in the form of an M-class flare
      before they dissapear completely.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 94
      SFI : 137
      A index : 22
      K index : 3

      Solar wind speed : 370.2 km/sec
      Solar wind density : 3.8 protons/cc
      Solar wind pressure : 0.9 nPa

      IMF : 3.3 nT
      IMF Orientation : 0.5 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 :
      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 levels with a chance of
      isolated M-class activity. Regions 324 and 321 have the potential for
      M-class activity.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at unsettled to active
      conditions. Elevated solar wind speeds and oscillating Bz are expected
      to gradually decline over the next few days. Late on day two or early
      on day three a weak CME shock from the M1.9 flare on 04 April may
      result in isolated active to minor storm conditions.

      Recent significant solar flare activity :
      None
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