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Solar Activity for 4/25/04

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  • David
    ** Aurora Watch In Effect ** Two sunspot regions, regions 597 and 599, have combined to produce a pair of M-class flare in the last 48 hours. Region 597 has
    Message 1 of 1 , Apr 25 10:16 PM
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      ** Aurora Watch In Effect **

      Two sunspot regions, regions 597 and 599, have combined to produce a
      pair of M-class flare in the last 48 hours. Region 597 has rotated
      over the western limb of the solar disk, but region 599 is still in
      view. Region 599 has the potential for producing another significant
      flare or two. Although there haven't been any new images from the
      SOHO satellite since it encountered problems on the 22nd, there should
      be a coronal hole in an Earth-pointing position now. We should
      encountering the solar wind gusts from on Monday, thus the aurora
      watch. If aurora do occur, the best sightings will be in the higher
      latitudes. Hopefully SOHO will be placed back in normal mode on Monday.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 45
      SFI : 107
      A index : 12
      K index : 2

      Solar wind speed : 500.5 km/sec
      Solar wind density : 2.2 protons/cc
      Solar wind pressure : 1.0 nPa

      IMF : 4.8 nT
      IMF Orientation : 0.3 nT North

      Conditions for the next 24 hours :
      Space weather for the past 24 hours has been minor. Radio blackouts
      reaching the R1 level occurred.

      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 mostly low, but there is a fair
      chance for an additional, isolated M-class event during the next three
      days from Region 599.

      Geomagnetic activity forecast :
      The geomagnetic field should persist at the current, mostly unsettled
      levels for the next 24-36 hours (26 April to partway through 27
      April). A decrease is expected to begin partway through the 2nd day
      (27 April) and quiet to unsettled levels should prevail on the third
      day (28 April).

      Recent significant solar flare activity :
      25-Apr-2004 0537Z M2.2
      23-Apr-2004 2112Z M1.1
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