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Solar activity report for 1/4/02

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  • b1blancer_29501
    There was a gigantic, bright, and incredibly beautiful coronal mass ejection (CME) earlier today. This CME startled even veteran solar physicists with its
    Message 1 of 702 , Jan 4, 2002
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      There was a gigantic, bright, and incredibly
      beautiful coronal mass ejection (CME) earlier today. This
      CME startled even veteran solar physicists with its
      size, beauty, and complexity. It was caused by a
      filemant eruption. A filament, also known as a prominence,
      is a gigantic loop of gas that is suspended above
      the photospere by a magnetic field. Take a look at
      the following links.<br><br>This is a short movie of
      the event as captured by the extreme UV telescope
      aboard the SOHO (Solar and Heliospheric Observatory)
      satellite.
      <a href=http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/eit_exp3.mpg target=new>http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/eit_exp3.mpg</a><br><br>These next 2 are movies of the event as imaged by the
      coronagraph on the SOHO satellite.
      <a href=http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/c2c_exp5.mpg target=new>http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/c2c_exp5.mpg</a><br><a href=http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/c3c_exp5.mpg target=new>http://soho.nascom.nasa.gov/hotshots/2002_01_04/slower/c3c_exp5.mpg</a><br><br>This last one is a link to the whole story, including
      still pictures. This is something you don't see every
      day. Absolutely amazing.
      <a href=http://soho.nascom.nasa.gov/hotshots/2002_01_04/ target=new>http://soho.nascom.nasa.gov/hotshots/2002_01_04/</a> .<br><br>There may have been a faint halo
      component to this CME. If there was, the shock should
      arrive here sometime Sunday or Monday. Newly numbered
      sunspot region 9773, which is emerging over the
      northeastern limb of the solar disk, was responsible for the
      show. It also spawned an M-class flare today. A large
      coronal hole is also rotating over the sun's eastern
      limb. It could be a factor by the end of next
      week.<br><br>The current solar and geomagnetic conditions are
      :<br><br>NOAA sunspot number : 248<br>SFI : 218<br>A index :
      4<br>K index : 0<br><br>Solar wind speed : 354.6
      km/sec<br>Solar wind density : 0.2 protons/cc<br>Solar wind
      pressure : 0.1 nPa<br><br>IMF : 4.6 nT<br>IMF Orientation
      : 1.9 nT North <br><br>Conditions for the last 24
      hours :<br>Solar activity was moderate. The geomagnetic
      field was quiet to unsettled. A satellite proton event
      began at 0245 UTC on 30 December.<br><br>Forecast for
      the next 24 hours :<br>Solar activity will be low to
      moderate. The geomagnetic field will be quiet to unsettled.
      The proton event is expected to
      continue.<br><br>Solar activity forecast :<br>Solar activity will be low
      to moderate. The geomagnetic field will be quiet to
      unsettled. The proton event is expected to
      continue.<br><br>Geomagnetic activity forecast :<br>The geomagnetic field is
      expected to be quiet to active. Quiet levels are expected
      on the first day of the period. A shock arrival from
      a C5/1f on 03/0220 UTC event is expected to arrive
      midday on day two of the period. By day three activity
      is expected to return to unsettled levels. The
      >10 MeV proton event is expected to end late today or
      early on day one of the forecast period<br><br>Recent
      significant solar flare activity :<br>04-Jan-2002 1749Z M1.0
    • 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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