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E3A12:What is most likely to result in auroral propagation?

E3A12E3A

What is most likely to result in auroral propagation?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E3A12 is Severe geomagnetic storms.

The key fact is Severe geomagnetic storms. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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