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Solar Activity Report for 4/5/03

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  • David
    ** Aurora Watch In Effect ** The CME impact mentioned in my last report is still influencing the geomagnetic conditions. G-1 geomagnetic storm conditions have
    Message 1 of 1 , Apr 5 9:51 PM
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      ** Aurora Watch In Effect **

      The CME impact mentioned in my last report is still influencing the
      geomagnetic conditions. G-1 geomagnetic storm conditions have been
      observed within the last 24 hours, and an aurora watch is still in
      effect. There have already been a few aurora sightings in northern
      Europe, as can be seen here :
      http://science.nasa.gov/spaceweather/aurora/gallery_01apr04.htm . The
      may be more fun on the way. Just about any time now, the Earth should
      encounter a high speed coronal hole solar wind stream. Depending upon
      what the interplanetary magnetic field does, activity could reach
      major storm level. There has been one significant flare within the
      last day, that being an M-1 event from sunspot region 588. Region 588
      is a relatively new arrival, and will be in view for several days yet.
      Watch this sunspot region, as it has the potential for generating
      more M-class flares.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 68
      SFI : 109
      A index : 22
      K index : 4

      Solar wind speed : 513.9 km/sec
      Solar wind density : 5.2 protons/cc
      Solar wind pressure : 2.1 nPa

      IMF : 11.5 nT
      IMF Orientation : 1.5 nT North

      Conditions for the last 24 hours :
      Space weather for the past 24 hours has been minor. Geomagnetic
      storms reaching the G1 level occurred. Radio blackouts reaching the R1
      level occurred.

      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 be at very low to low levels.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at predominantly active levels
      for 4-5 April. During the first two days, isolated minor storm
      conditions may persist especially in the nighttime sectors, due to the
      potential of further transient activity, and the likelihood of a
      recurrent co-rotating interaction region. Major storm levels are
      expected due to a strong recurrent high speed coronal hole stream that
      is due to become geoeffective on 6 April.

      Recent significant solar flare activity :
      05-Apr-2004 0555Z M1.7
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