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Solar Activity Report for 8/25/05

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  • David
    Impact!! The CME s arrived in a big way. Within the last 48 hours, G-5 geomagnetic storm conditions have been observed. Aurora were seen and photographed as
    Message 1 of 1 , Aug 25 8:04 PM
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      Impact!!

      The CME's arrived in a big way. Within the last 48 hours, G-5
      geomagnetic storm conditions have been observed. Aurora were seen and
      photographed as far south as Park City, Utah. There were also
      numerous sightings across the northern US and Canada, as can be seen
      here. http://www.spaceweather.com/aurora/gallery_01aug05.htm . The
      solar wind speed spiked at near 750 km/sec, although it has backed off
      some since then. Region 798, the source of the all the excitement,
      has rotated out of view over the western limb. It did manage to get
      off a parting shot in the form of an quite impressive but
      short-duration M-6 class flare. There are a couple of small sunspot
      regions visible, but neither looks to have the ability to generate a
      significant flare at the present time. The actiity level should
      decrease over the next couple of days as the geomagnetic field settles
      down in the aftermath of the CME impact.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 76
      SFI : 92
      A index : 21
      K index : 2

      Solar wind speed : 586.8 km/sec
      Solar wind density : 2.8 protons/cc
      Solar wind pressure : 1.4 nPa

      IMF : 3.4 nT
      IMF Orientation : 2.4 nT South

      GOES-12 Background X-ray Flux level : B1

      Conditions for the last 24 hours :
      Space weather for the past 24 hours has been moderate. Geomagnetic
      storms reaching the G1 level occurred. Radio blackouts reaching the R2
      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, but there is a chance for an
      isolated M-class event from Region 800 or Region 803 during the next
      three days (26-28 August).

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be predominantly unsettled with a
      chance for isolated active periods for 26 August. Conditions should be
      generally unsettled for 27-28 August.

      Recent significant solar flare activity :
      25-Aug-2005 0440Z M6.4
      23-Aug-2005 1444Z M2.7
      22-Aug-2005 1727Z M5.6
      22-Aug-2005 0133Z M2.6
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