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Solar Activity Report for 9/8/01

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  • b1blancer_29501
    The M-class flares keep coming with regularity from 3 different sunspot groups. Sunspot group 9601 continues to be active, and while it is still capable of
    Message 1 of 702 , Sep 8, 2001
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      The M-class flares keep coming with regularity
      from 3 different sunspot groups. Sunspot group 9601
      continues to be active, and while it is still capable of
      producing a major flare, it is just about to rotate over
      the western limb of the solar disk. Meanwhile, the
      southeastern portion of the solar disk is covered by a massive
      sunspot complex, which spans over 20 Earth diameters.
      There are 5 discreet sunspot groups in this complex. Of
      those, sunspot groups 9606 and 9608 have the greatest
      potential for producing an M-class or greater
      flare.<br><br>The current solar and geomagnetic conditions are
      :<br><br>NOAA sunspot number : 281<br>SFI : 250<br>A index :
      8<br>K index : 2<br><br>Solar wind speed : 381.6
      km/sec<br>Solar wind density : 0.2 protons/cc<br>Solar wind
      pressure : 0.1 nPa<br><br>IMF : 7.9 nT<br>IMF Orientation
      : 2.5 nT South<br><br>Conditions for the last 24
      hours :<br>Solar activity was moderate. The geomagnetic
      field was quiet to unsettled.<br><br>Forecast for the
      next 24 hours :<br>Solar activity will be moderate to
      high. The geomagnetic field will be quiet to
      unsettled.<br><br>Solar activity forecast :<br>Solar activity is expected
      to be moderate to high. M-class flares are probable
      and a chance of an isolated major flare in Regions
      9601 or 9608 remains.<br><br>Geomagnetic activity
      forecast :<br>The geomagnetic field is expected to be
      quiet to unsettled<br><br>Recent solar flare activity
      :<br>09-Sep-2001 0240Z M1.9 <br>08-Sep-2001 1923Z M1.1
      <br>08-Sep-2001 0457Z 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 9:47 PM
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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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