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Solar Activity Report for 7/31/03

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  • David
    ** G-1 Geomagnetic Storm In Progress ** ** Aurora Watch In Effect ** July is ending with a bang, with high speed solar wind, geomagnetic storm conditions, and
    Message 1 of 1 , Jul 31 9:19 PM
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      ** G-1 Geomagnetic Storm In Progress **
      ** Aurora Watch In Effect **

      July is ending with a bang, with high speed solar wind, geomagnetic
      storm conditions, and aurora. A G-1 class (minor) geomagnetic storm
      is in progress now, and the solar wind speed is flirting with the 800
      km/sec mark. The Earth has been inside of a high speed, coronal hole
      solar wind stream for almost a week now, which has produced some
      impressive aurora displays over the northern US and Canada, as can be
      seen here :
      http://science.nasa.gov/spaceweather/aurora/gallery_01jul03_page2.html
      The current conditions are expected to persist for about the next 48
      hours before settling down. Sunspot region 421 continues to be a
      potential source for M-class flares, and in fact has already produced
      a pair of them. The background X-ray flux is rising, so I wouldn't be
      surprised to see one or two more.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 65
      SFI : 102
      A index : 33
      K index : 5

      Solar wind speed : 787.3 km/sec
      Solar wind density : 1.7 protons/cc
      Solar wind pressure : 1.5 nPa

      IMF : 6.0 nT
      IMF Orientation : 1.4 nT South

      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 at low levels.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be at unsettled to active levels
      for the first two days of the forecast period. Minor storm conditions
      are possible during nighttime for the first day of the interval. Day
      three should see a decrease to quiet to unsettled levels.

      Recent significant solar flare activity :
      30-Jul-2003 0410Z M2.5
      29-Jul-2003 0139Z M1.3
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