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Solar Activity Report for 12/10/02

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  • David <b1blancer1@earthlink.net>
    The solar wind speed is dropping back to more normal levels, and it appears that the Earth is now exiting from its latest encounter with a high speed solar
    Message 1 of 1 , Dec 10, 2002
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      The solar wind speed is dropping back to more normal levels, and it
      appears that the Earth is now exiting from its latest encounter with a
      high speed solar wind stream. Not that you would have noticed there
      ever was an encounter unless you had been watching the solar wind
      speed. A persistent north-pointing Interplanetary Magnetic Field
      supressed any geomagnetic activity. There are eight numbered sunspot
      regions dotting the solar disk tonight. Of the group, sunspot region
      220 is the largest, and looks to have the potential for producing an
      M-class flare. Radio sweep and X-ray data show that there was an M-1
      class flare today, although it didn't have a correlated optical event
      to show where it came from. There is a small coronal hole in an
      Earth-pointing position. Stay tuned to see if we will see any effects
      from that.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 142
      SFI : 161
      A index : 7
      K index : 2

      Solar wind speed : 382.4 km/sec
      Solar wind density : 1.2 protons/cc
      Solar wind pressure : 0.3 nPa

      IMF : 4.5 nt
      IMF Orientation : 2.9 nT North

      Conditions for the last 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 low to moderate. Region 220 is the
      most likely source of M-class activity.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to unsettled.

      Recent significant solar flare activity :
      10-Dec-2002 1226Z M1.1
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