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Solar Activity Report for 4/7/04

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  • David
    ** Aurora Watch In Effect ** The Earth is remains inside of a coronal hole solar wind stream, and an aurora watch is still in effect. The effect of the high
    Message 1 of 1 , Apr 7 10:04 PM
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      ** Aurora Watch In Effect **

      The Earth is remains inside of a coronal hole solar wind stream, and
      an aurora watch is still in effect. The effect of the high speed
      stream hasn't been very pronounced. For that matter, the high speed
      stream isn't very high speed now, hovering in the mid-400 km/sec
      range. However, more interesting times could be on the way. Sunspot
      region 588 fired off a nice M-2 class flare on the 6th. There was a
      full-halo, albeit somewhat lopsided, full-halo CME associated with the
      event. It is expected to arrive sometime on the 8th, and while it
      won't be a direct hit, it should be enough to cause an increase in the
      level of geomagnetic activity. Region 588 still looks to have the
      ability to generate an isolated M-class flare.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 57
      SFI : 98
      A index : 13
      K index : 2

      Solar wind speed : 448.4 km/sec
      Solar wind density : 5.0 protons/cc
      Solar wind pressure : 1.6 nPa

      IMF : 6.8 nT
      IMF Orientation : 2.6 nT South

      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 very low to low. Region 588 still has
      the potential to produce C-and isolated M-class flares.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to active, with periods
      of minor storm conditions possible on day one and two (8-9 April). Two
      CMEs, associated with solar flares on 6 and 7 April, may cause
      activity in Earth's geomagnetic field. Geomagnetic activity should
      subside to unsettled levels on day three (10 April).

      Recent significant solar flare activity :
      06-Apr-2004 1328Z M2.4
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