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Solar Activity Report for 10/11/01

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  • b1blancer_29501
    ** G-1 Geomagnetic Storm In Progress ** ** Aurora Watch In Effect ** The CME that erupted off of the sun on 10/9 slammed into Earth s magnetosphere
    Message 1 of 702 , Oct 11, 2001
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      ** G-1 Geomagnetic Storm In Progress **<br>**
      Aurora Watch In Effect **<br><br>The CME that erupted
      off of the sun on 10/9 slammed into Earth's
      magnetosphere earlier today and triggered a G-1 class
      geomagnetic storm, which is still ongoing. The solar wind
      speed and density are substantially elevated.
      Geomagnetic storm conditions are expected to last for the
      next 24 hours. Mid and high latitude aurora are a
      distinct possibility, and folks should keep an eye to the
      sky after local midnight. Solar wind gusts from a
      coronal hole that just crossed the sun's central meridian
      should help keep the geomagnetic field unsettled for the
      next 2 or 3 days.<br><br>The current solar and
      geomagnetic conditions are :<br><br>NOAA sunsput number :
      174<br>SFI : 175<br>A index : 17<br>K index : 5<br><br>Solar
      wind speed : 587.1 km/sec<br>Solar wind density : 31.6
      protons/cc<br>Solar wind pressure : 17.0 nPa<br><br>IMF : 18.8
      nT<br>IMF Orientation : 2.8 nT North<br><br>Conditions for
      the last 24 hours :<br>Solar activity was low. The
      geomagnetic field was at quiet to minor storm
      levels.<br><br>Forecast for the next 24 hours :<br>Solar activity will be
      low to moderate. The geomagnetic field will be at
      unsettled to major storm levels.<br><br>Solar activity
      forecast :<br>Solar activity is expected to at low to
      moderate levels.<br><br>Geomagnetic activity forecast
      :<br>Geomagnetic activity is expected to be at unsettled to minor
      storming levels with isolated major storm conditions
      through day one. Unsettled to active conditions are
      expected on days two and three as a coronal hole rotates
      into geoeffective position<br><br>Recent significant
      solar flare activity :<br>09-Oct-2001 1113Z M1.4
    • 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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