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Solar Activity Report for 7/23/04

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  • David
    The last 24 hours have seen geomagnetic storm conditions reach the G-2 level, and there could be more on the way. The CME from the M8.6 flare mentioned in my
    Message 1 of 1 , Jul 23, 2004
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      The last 24 hours have seen geomagnetic storm conditions reach the G-2
      level, and there could be more on the way. The CME from the M8.6
      flare mentioned in my last report struck home, triggering a
      geomagnetic storm and aurora. Some impressive aurora were seen and
      photographed in the northern US and Canada, as can be seen here :
      http://science.nasa.gov/spaceweather/aurora/gallery_01jul04.htm .
      There are at least two more weak CME's on the way, and the next couple
      days could well see a continuation of the geomagnetic activity. All
      of the action is due to a series of powerful flares fired of by
      sunspot region 652. This is a large sunspot region, and is easily
      naked eye visible. More flares are definitely a possibility over the
      next few days.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 86
      SFI : 165
      A index : 40
      K index : 3

      Solar wind speed : 557.8 km/sec
      Solar wind density : 14.8 protons/cc
      Solar wind pressure : 6.5 nPa

      IMF : 13.6 nT
      IMF Orientation : 5.3 nT North

      GOES-12 Background X-ray Flux level : B6

      Conditions for the last 24 hours :
      Space weather for the past 24 hours has been moderate. Geomagnetic
      storms reaching the G2 level occurred. Radio blackouts reaching the R1
      level occurred.

      Forecast for the next 24 hours :
      Space weather for the next 24 hours is expected to be moderate.
      Geomagnetic storms reaching the G1 level are expected. Radio blackouts
      reaching the R2 level are expected.

      Solar acticity forecast :
      Solar activity is expected to be moderate to high. Region 652 may
      still produce major flares.

      Geomagnetic activity forecast :
      The geomagnetic field is expected to be quiet to active tomorrow (24
      July) as the current activity subsides. A CME observed on 22 July may
      produce active and isolated minor storm conditions on 24 July.
      Activity should decrease to unsettled levels on 25 July. CME activity
      associated with today's C1 and M2 flares will likely impact Earth's
      geomagnetic field on 26 July, with active to minor storm conditions
      possible.

      Recent significant solar flare activity :
      23-Jul-2004 2123Z M1.7
      23-Jul-2004 1728Z M2.2
      22-Jul-2004 2258Z M1.6
      22-Jul-2004 0032Z M9.1
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