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E3B09:At what time of year is sporadic-E propagation most likely to occur?

E3B09E3B

At what time of year is sporadic-E propagation most likely to occur?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E3B09 is Around the solstices, especially the summer solstice.

The key fact is Around the solstices, especially the summer solstice. 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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More questions in E3B

E3B01Where is transequatorial propagation (TEP) most likely to occur?E3B02What is the approximate maximum range for signals using transequatorial propagation?E3B03At what time of day is transequatorial propagation most likely to occur?E3B04What are “extraordinary” and “ordinary” waves?E3B05Which of the following paths is most likely to support long-distance propagation on 160 meters?E3B06On which of the following amateur bands is long-path propagation most frequent?