In the Northern Hemisphere this usually peaks in May, June and July. It often goes on longer, but less often. Bands most affected are 10m and 6m, although less often it can extend to 4m, Band II FM and even 2m.
The sad thing is outside the Es season, these bands may be deserted for hours on end. With modes like FT4 and FT8 it is much more likely that short openings will be caught. Peaks in propagation may be very short.
It is worth reminding people that Es can occur at any time.
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