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Question 140

What is most likely to result in auroral propagation?

  1. Meteor showers
  2. Quiet geomagnetic conditions
  3. Severe geomagnetic stormsCorrect answer
  4. Extreme low-pressure areas in polar regions

Explanation

Auroral propagation needs the dense, field-aligned ionization of an active auroral oval, which appears when charged particles from the Sun are funnelled into the polar upper atmosphere during a severe geomagnetic storm. Quiet geomagnetic conditions are the opposite case, meteor showers produce a different and unrelated scattering mechanism, and surface air pressure has no effect at ionospheric heights.

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Question 140: What is most likely to result in auroral propagation? · FCC Amateur Extra Class (Element 4) · Questena