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Solar Activity Report for 4/20/06

  • David
    Apr 20 8:27 PM Expand Messages
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      The past 10 days have seen geomagnetic storm conditions reach the G-2
      level, and some quite beautiful aurora were seen and photographed
      across the northern US and Canada, as can be seen here :
      http://www.spaceweather.com/aurora/gallery_01apr06_page3.htm . Yes, it
      is indeed possible to have geomagnetic storms and aurora, even at the
      solar minimum. Conditions are quiet at the moment, with a single,
      small sunspot being visible. A loosely organized but large coronal
      hole could kick up the solar wind speeds along about the 23rd.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 30
      SFI : 79
      A index : 4
      K index : 1

      Solar wind speed : 387.6 km/sec
      Solar wind density : 0.5 protons/cc
      Solar wind pressure : 0.1 nPa

      IMF : 4.3 nT
      IMF Orientation : 0.6 nT South

      GOES-12 Bacckground X-ray Flux level : A3

      Conditions for the last 24 hours :
      No space weather storms were observed for the past 24 hours.

      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 at very low to low levels. Region 874
      has a slight chance of producing an isolated C-class flare.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at quiet to unsettled levels.
      A weak recurrent coronal hole may lead to isolated active periods on
      23 April.

      Recent significant solar flare activity :