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Solar Activity Report for 7/19/03

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  • David
    ** Aurora Watch In Effect ** With short nights and long days in the northern hemisphere, you usually don t think of the summer months as a good aurora-watching
    Message 1 of 1 , Jul 19, 2003
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      ** Aurora Watch In Effect **

      With short nights and long days in the northern hemisphere, you
      usually don't think of the summer months as a good aurora-watching
      period of time. This summer, however, has been an exception. With a
      steady procession of coronal holes, plus some occasional good flares,
      this summer has been good. Tonight may continue the trend, as the
      solar wind speed is within shouting distance of 700 km/sec due to
      coronal hole effects, although it is pretty tenous at less about one
      proton/cc. Nevertheless, an aurora watch remains in effect, and G-1
      geomagnetic storm conditions have been observed within the last 24
      hours. There haven't been any significant flares within the last 24
      hours, although the background X-ray flux has been steadily rising.
      Sunspot region has grown fast, and looks to be a potential source for
      some M-class flares.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 178
      SFI : 146
      A index : 27
      K index : 4

      Solar wind speed : 660.1 km/sec
      Solar wind density : 1.2 protons/cc
      Solar wind pressure : 0.7 nPa

      IMF : 6.8 nT
      IMF Orientation : 4.5 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.

      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 low to moderate. There is a good
      chance for M-class activity from Regions 410 and 412.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to continue at mostly unsettled to
      active periods through day one with isolated minor storm periods
      possible. Quiet to unsettled levels are expected on days two and three
      with isolated active periods likely.

      Recent significant solar flare activity :
      None
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