Odd patterns from a station

Arnold Harding - KQ6DI

I’m seeing odd patterns of lines appear from a station, and I’m wondering why.  The station is KJ6DZB-3 in the San Francisco Bay Area (Berkeley to be more precise).

I’ve seen multi-sided almost circles, vertical lines.  The lines might go 100 km, sometimes just North, other times North and South.  The “circle” is odd because it’s not round.


Insight would be appreciated.





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