Extra exam question E3A12
Subelement E3, RADIO WAVE PROPAGATION· Group E3A
What is most likely to result in auroral propagation?
- A.Meteor showers
- B.Quiet geomagnetic conditions
- C.Severe geomagnetic storms (correct answer)
- D.Extreme low-pressure areas in polar regions
WhyAuroral propagation is most likely to result from severe geomagnetic storms. Auroral propagation is driven by severe geomagnetic storms, disturbances that energize the upper atmosphere near the poles and create ionization irregularities capable of scattering VHF and UHF signals, answer C. Meteor showers cause a different propagation mode entirely, quiet geomagnetic conditions are essentially the opposite of what triggers an aurora, and low-pressure weather systems are a tropospheric phenomenon unrelated to auroral radio propagation.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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