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Solar Activity Report for 1/21/02

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  • b1blancer_29501
    The Earth s magnetosphere was buffeted by a high speed solar wind stream over the weekend, and the geomagnetic field actually reached minor storm conditions
    Message 1 of 702 , Jan 21, 2002
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      The Earth's magnetosphere was buffeted by a high
      speed solar wind stream over the weekend, and the
      geomagnetic field actually reached minor storm conditions for
      a short time, causing some high latitude aurora.
      That activity has subsided now. There are quite a few
      sunspots visible on the solar disk, but none of them
      appear to have the potential of generating a significant
      flare at this time.<br><br>The current solar and
      geomagnetic conditions are :<br><br>NOAA sunspot number :
      187<br>SFI : 225<br>A index : 11<br>K index : 1<br><br>Solar
      wind speed : 395.5 km/sec<br>Solar wind density : 1.9
      protons/cc<br>Solar wind pressure : 0.5 nPa<br><br>IMF : 3.9
      nT<br>IMF Orientation : 2.2 nT South<br><br>Conditions for
      the last 24 hours : <br>Solar activity was low. The
      geomagnetic field was quiet to unsettled.<br><br>Forecast for
      the next 24 hours :<br>Solar activity will be low.
      The geomagnetic field will be quiet to
      unsettled.<br><br>Solar activity forecast :<br>Solar activity is expected
      to be at low levels. A chance for an isolated
      low-level M-class flare remains
      possible.<br><br>Geomagnetic activity forecast :<br>The geomagnetic field
      activity is expected to be at quiet to unsettled levels.
      High latitudes may experience isolated active
      conditions due to coronal hole high speed stream
      effects<br><br>Recent significant solar flare activity :<br>19-Jan-2002
      1005Z M1.2
    • b1blancer_29501
      On Feb 28th, the Interplanetary Magnetic Field swung to a strong south-pointing orientation. That, coupled with an elevated solar wind speed and density,
      Message 702 of 702 , Mar 1, 2002
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        On Feb 28th, the Interplanetary Magnetic Field
        swung to a strong south-pointing orientation. That,
        coupled with an elevated solar wind speed and density,
        triggered a G-1 class geomagnetic storm. The result was
        some high latitude aurora. See this link for a
        photgraph of aurora observed over Quebec :
        <a href=http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg target=new>http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg</a> . As of right now, there are 3 sunspot regions,
        namely 9839, 9842, and 9845, that appear to be capable
        of producing M-class flares. Regions 9839 and 9842
        are close to rotating out of view over the western
        limb of the solar disk. Sunspot region 9845, however,
        is close to the sun's central meridian. A rather
        large coronal hole is also approaching the sun's
        central meridian, and coming into an Earth-pointing
        position. High speed colar wind gusts are likely around the
        first of next week.<br><br>The current solar and
        geomagnetic conditions are :<br><br>NOAA sunspot number :
        153<br>SFI : 188<br>A index : 10<br>K index : 1<br><br>Solar
        wind speed : 372.3 km/sec<br>Solar wind density : 4.4
        protons/cc<br>Solar wind pressure : 1.1 nPa<br><br>IMF : 8.4
        nT<br>IMF Orientation : 0.7 nT North<br><br>Conditions for
        the last 24 hours : <br>Solar activity was low. The
        geomagnetic field was quiet to unsettled. Stratwarm Alert
        exists Friday.<br><br>Forecast for the next 24 hours
        :<br>Solar activity will be low to moderate. The geomagnetic
        field will be quiet to unsettled.<br><br>Solar Activity
        Forecast :<br>Solar activity is expected to be low to
        moderate for the next three days. Region 9845 is a
        possible source for isolated M-class
        flares.<br><br>Geomagnetic activity forecast :<br>Geomagnetic field activity
        is expected to be mainly quiet to unsettled, until
        the onset of high speed stream effects from a
        recurrent coronal hole begin to develop by day three of the
        forecast period. Isolated active conditions are
        anticipated thereafter.<br><br>Recent significant solar flare
        activity :<br>None
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