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Solar Activity Report for 4/17/03

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  • David
    ** Aurora Watch In Effect ** The high speed solar wind flow continues tonight, and was up over the 700 km/sec earlier today. There were G-2 geomagnetic storm
    Message 1 of 1 , Apr 17 8:45 PM
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      ** Aurora Watch In Effect **

      The high speed solar wind flow continues tonight, and was up over the
      700 km/sec earlier today. There were G-2 geomagnetic storm conditions
      observed within the last 24 hours. While the solar wind speed has
      dropped of some, aurora are still a definite possibility tonight, and
      skywatchers in the higher latitudes should keep an eye to the sky.
      The activity should continue for about the next 24 hours, but then
      drop off as the solar wind speed declines. There is but a single
      numbered sunspot region visible on the solar disk, although it looks
      like there are more getting ready to rotate into view, and the
      background X-ray flux has increased during the last 24 hours.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 37
      SFI : 101
      A index : 26
      K index : 2

      Solar wind speed : 619.1 km/sec
      Solar wind density : 3.6 protons/cc
      Solar wind pressure : 2.4 nPa

      IMF : 7.3 nT
      IMF Orientation : 0.4 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 :
      No space weather storms are expected for the next 24 hours.

      Solar activity forecast :
      Solar activity is expected to be very low to low. The background
      levels are likely to continue to increase slightly with the addition
      of regions which are now visible in GOES Solar x-ray imagery behind
      East limb at N20 and S25.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be mostly active but decreasing
      to unsettled within the next 24 hours as the current disturbance
      transitions out of geoeffective range. Continued unsettled levels are
      expected for days two and three.

      Recent significant solar flare activity :
      None
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