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Solar Activity Report for 4/10/03

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  • David
    ** Aurora Watch In Effect ** The solar wind speed has jumped up close to the 700 km/sec mark, and an aurora watch is in effect. G-1 geomagnetic storm
    Message 1 of 1 , Apr 10 8:58 PM
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      ** Aurora Watch In Effect **

      The solar wind speed has jumped up close to the 700 km/sec mark, and
      an aurora watch is in effect. G-1 geomagnetic storm conditions have
      been observed within the last 24 hours, and aurora have already been
      spotted. See this link for some really good aurora pictures :
      http://science.nasa.gov/spaceweather/aurora/gallery_01apr03.html .
      The large coronal hole that is causing all the action is in a direct
      Earth-pointing position. Because of the coronal hole's size, we'll be
      in the high speed solar wind stream for at least the next three days.
      Sunspot-wise, there isn't much going on with only two numbered
      sunspot regions visible, although a nice M-2 class flare was observed
      yesterday. Look for the current increased geomagnetic level to stay
      elevated along with the solar wind speed for a while, and more
      geomagnetic storms are likely.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 52
      SFI : 104
      A index : 27
      K index : 4

      Solar wind speed : 682.0 km/sec
      Solar wind density : 1.4 protons/cc
      Solar wind pressure : 1.4 nPa

      IMF : 7.4 nT
      IMF Orientation : 0.3 nT South

      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. Regions
      325(N14W77) and 330 have C-class potential.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at quiet to active levels.
      Coronal hole high speed stream effects are expected on day two and day
      three of the period.

      Recent significant solar flare activity :
      09-Apr-2003 2329Z M2.5
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