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Solar Activity Report for 3/29/03

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  • David
    ** Aurora Watch In Effect ** The solar wind speed has slowed down a bit, but is still elevated, and in fact, geomagnetic storm conditions have been observed
    Message 1 of 1 , Mar 29 9:37 PM
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      ** Aurora Watch In Effect **

      The solar wind speed has slowed down a bit, but is still elevated, and
      in fact, geomagnetic storm conditions have been observed within the
      last 24 hours. Therefore, an aurora watch is in effect tonight. The
      most recent round of high speed solar wind has created some aurora
      displays. While most of the aurora activity occurred over Alask and
      Canada, aurora were spotted as far south as Wisconsin. Pictures here
      :
      http://science.nasa.gov/spaceweather/aurora/gallery_01mar03_page2.html
      . The tail end of the very elongated coronal hole that has caused all
      of the recent activity is just now rotating through an Earth-pointing
      position. Expect the solar wind speed to stay elevated at least to
      some degree through April 2nd or 3rd. There are several sunspot
      regions visible tonight. This is quite a contrast from not long ago
      when on a couple of occasions there was only a single sunspot region
      visible. Depending on which source you listen to, either sunspot
      regions 318 and 323, or sunspot regions 319 and 321 have some M-class
      flare producing potential.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 155
      SFI : 155
      A index : 21
      K index : 4

      Solar wind speed : 470.9 km/sec
      Solar wind density : 5.7 protons/cc
      Solar wind pressure : 2.4 nPa

      IMF : 11.6 nT
      IMF Orientation : 6.9 nT North

      Conditions for the last 24 hours :
      Space weather for the past 24 hours has been minor. Geomagnetic storms
      reaching the G1 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 low to moderate. The potential for
      M-class flares is increasing with the rapid development in Regions 318
      and 323.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to active with isolated
      minor storm periods likely over the next three days. Weak coronal hole
      effects are expected on days two and three.

      Recent significant solar flare activity :
      None
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