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Solar Activity Report for 4/10/04

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  • David
    ** Aurora Watch In Effect ** We ve been seeing on-and-off G-1 geomagnetic storm conditions over the last few days. There have been a series of weak CME
    Message 1 of 1 , Apr 10, 2004
      ** Aurora Watch In Effect **

      We've been seeing on-and-off G-1 geomagnetic storm conditions over the
      last few days. There have been a series of weak CME impacts.
      Nonething has been strong enough to ring any bells, but there have
      been a few aurora sigghtings in northern Canada and Alaska. That
      general pattern is expected to continue over the next few days.
      Sunspot region 588, the only sunspot region visible, has been
      producing C-class and occasional M-class flares, and has been the
      source of the CME's. A C-2 event that occurred on the 9th, and fired
      off yet another full-halo CME, which should arrive on or about the
      12th. Additionally, an M-1 flare has just occurred. There should be
      more data on that available Sunday or Monday. There's also a small
      coronal hole that is rotating into an Earth-pointing poisition. So,
      while we won't likely see any major geomagnetic storm conditions,
      expect to see a generally active geomagnetic environment, with
      occasional geomagnetic storms popping up, over the next three days.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 20
      SFI : 88
      A index : 12
      K index : 3

      Solar wind speed : 420.0 km/sec
      Solar wind density : 4.8 protons/cc
      Solar wind pressure : 1.2 nPa

      IMF : 5.4 nT
      IMF Orientation : 0.3 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. Isolated C-class
      flares are possible from Region 588.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to active. Occasional
      active periods are expected on 11 April following today's CME arrival.
      Updated LASCO imagery reveal another Earth-directed CME associated
      with yesterday's C2 flare at 09/2040Z. A geomagnetic response is
      likely on 12 April, but the disturbance should be limited to
      occasional active periods. Mostly quiet to unsettled conditions are
      expected on 13 April.

      Recent significant solar flare activity
      11-Apr-2004 0420Z M1.0
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