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Solar Activity Report for 2/26/05

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  • David
    ** Aurora Watch In Effect ** The earth is moving inside of a high speed coronal hole solar wind stream, and the solar wind speed has exceeded the 500 km/sec
    Message 1 of 1 , Feb 26, 2005
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      ** Aurora Watch In Effect **

      The earth is moving inside of a high speed coronal hole solar wind
      stream, and the solar wind speed has exceeded the 500 km/sec mark. So
      far, the effect has been minimal, although that could change. An
      aurora watch is in effect, and G-1 geomagnetic storm conditions are a
      possibility. The single sunspot region visible, region 737, is
      rotating over the western limb of the solar disk. With nothing
      emerging over the eastern limb, look for the sunspot number to drop
      towards zero, and the overall activity level to be very low as well
      once we exit the coronal hole solar wind stream. Such is life when
      you're drawing closer to solar minimum.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 27
      SFI : 77
      A index : 11
      K index : 1

      Solar wind speed : 535.1 km/sec
      Solar wind density : 3.2 protons/cc
      Solar wind pressure : 0.9 nPa

      IMF : 7.9 nT
      IMF Orientation : 5.9 nT North

      GOES-12 Background X-ray Flux level : A1

      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 very low.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at quiet to active with
      isolated minor storm levels occurring through 28 Feb. A high-speed
      solar wind stream associated with a coronal hole should become
      geoeffective from 27 through 28 Feb. Quiet to unsettled levels are
      expected for 01 Mar.

      Recent significant solar flare activity :
      None
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