June and July bring frequent 6-meter DX openings via long-distance sporadic-E propagation and persistent quiet geomagnetic conditions. These 2 months are well known to North American 6-meter DXers as the most productive time of year for DX up to 8,700 miles.
“The quiet geomagnetic season during June and July typically has only about half as many geomagnetic storms compared to March and April,” s…
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Source: ARRL