Magnetic field effects

• Exceptional flare can lead to
  • disruption of radio communications
    • ionosphere reflects radio waves
  • destruction of satellites
    • $4 million communication satellite 1997
  • power outages
    • loss of all electrical power to Quebec in ‘89

• Dynamo origin of magnetic fields

  • Same mechanism for Sun’s magnetic field
    • Requirements:
      • electrical conductor
        • Fe core
      • liquid
        • liquid core
      • convection
        • power supply, heat energy leaking out slowly
      • rotation

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