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Space Weather A Research Perspective (1997) / Chapter Skim
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SOLAR ORIGINS OF SPACE WEATHER
Pages 34-45

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 34...
... Sequence of white light coronagraph images from the Solar Maximum Mission spacecraft showing the release of a coronal mass ejection, a huge bubble of coronal plasma and magnetic field, from the Sun (courtesy of High Altitude Observatory)
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From page 35...
... Solar rotation causes the high-speed flows from the coronal hole regions to run into the slower flows as they propagate out from the Sun, producing compressive interaction regions. Because the solar source regions for the flows are relatively long lived, these stream interaction regions appear to rotate with the Sun in spiral configurations like that illustrated below.
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From page 36...
... Active Regions For well over a century, dark concentrations of intense magnetic fields called sunspots have been observed emerging from below the Sun's surface in an 11-year cycle. Recent space observations have revealed that the complexes of sunspots called active regions are the main source of long-lived solar ultraviolet and x-ray emissions.
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From page 37...
... . Flares are powerful explosions, lasting minutes to hours, that produce strong heating and acceleration of particles (courtesy of Solar Data Analysis Center, Goddard Space Flight Center)
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From page 38...
... Almost all manifestations of solar activity have some signature in radio waves, and the radio bursts themselves appear in many forms. The most notable radio emissions are intense bursts associated with flares or CMEs and long-lived noise storms associated with active regions.
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From page 39...
... file:///S|/SSB/stei62.jpg file:///S|/SSB/stei62.jpg [6/25/2003 4:37:31 PM]
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From page 40...
... file:///S|/SSB/slide13.jpg file:///S|/SSB/slide13.jpg [6/25/2003 4:37:34 PM]
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From page 41...
... file:///S|/SSB/eruption.gif file:///S|/SSB/eruption.gif [6/25/2003 4:37:38 PM]
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From page 42...
... file:///S|/SSB/windimf.gif file:///S|/SSB/windimf.gif [6/25/2003 4:37:41 PM]
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From page 43...
... file:///S|/SSB/energy_r.gif file:///S|/SSB/energy_r.gif [6/25/2003 4:37:45 PM]
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From page 44...
... file:///S|/SSB/ps_proto.gif file:///S|/SSB/ps_proto.gif [6/25/2003 4:37:49 PM]
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From page 45...
... file:///S|/SSB/radio.gif file:///S|/SSB/radio.gif [6/25/2003 4:37:51 PM]
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Key Terms

  • solar activity
  • magnetic field
  • interplanetary magnetic
  • space weather
  • active regions

  • coronal mass
  • solar ultraviolet
  • solar radio
  • solar maximum
  • solar rotation

  • interplanetary space
  • magnetic fields
  • coronal hole
  • mass ejections
  • mass ejection

  • activity cycle
  • figure below
  • radio bursts
  • radio burst
  • radio waves

  • normal solar
  • near solar
  • solar flares
  • solar data
  • maximum solar

  • slow solar
  • solar gas
  • solar phenomena
  • wind magnetometer
  • activity maximum


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
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