various color lines on the wsprnet.org map

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wn1z
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Joined: 2016/04/28 - 20:56
various color lines on the wsprnet.org map

Hello folks, just wondering what the meaning of the various colors are on the map: green, yellow, red, etc. Does it have to do with how recently that station heard me? (I am using the map only to show who has heard my signal.) Thanks

Orrin wn1z
northeast California CN90