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Solar Activity Report for 9/7/03

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  • David
    The solar wind speed has slowed down as the Earth has exited the most recent high speed solar wind stream, and what little geomagnetic activity there was has
    Message 1 of 1 , Sep 7, 2003
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      The solar wind speed has slowed down as the Earth has exited the most
      recent high speed solar wind stream, and what little geomagnetic
      activity there was has stopped. Things are pretty quiet this evening.
      However, there will be some more activity coming soon. Continuing
      what seems to be almost a constant parade of coronal holes, another
      one has rotated into an Earth-pointing position. We should see the
      high speed solar wind from that one arrive on the 9th or 10th. What,
      if any, geomagnetic activity we see will depend, as it did this most
      recent time, on what the Interplanetary Magnetic Field does. There
      are no significant flares to report, and none of the three numbered
      sunspot groups visible look to have the potential for generating much
      in the way of flares at this time. There was, however, a nice CME off
      of the southwestern limb of the solar disk earlier today that was
      associated with long-duration C-class flare. The space weather folks
      are saying we might get a bit of a glancing blow from it. Stay tuned.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 54
      SFI : 108
      A index : 7
      K index : 1

      Solar wind speed : 405.3 km/sec
      Solar wind density : 1.8 protons/cc
      Solar wind pressure : 0.5 nPa

      IMF : 4.8 nT
      IMF Orientation : 0.2 nT North

      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 low to very low. The current X-ray
      flux levels are elevated following today's eruption, but are expected
      to return to the pre-flare background level early in the period. Very
      isolated low C-class flares are possible.

      Geomnagnetic activity forecast :
      The geomagnetic field is expected to continue at quiet to unsettled
      levels through day one. A recurring high speed coronal hole stream
      will likely produce active to minor storm periods on days two and
      three. Activity on day three may be further enhanced by transient
      material from today's CME off the SW limb.

      Recent significant solar flare activity :
      None
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