Coloured lines indicate sporadic-E propagation reported in the following frequency bands during the last 30 minute period:
Blue lines = 28 MHz | Yellow lines = 50 MHz | Orange lines = 70 MHz | Red lines = 144 MHz | No-lines visible = No propagation reported
White parallel lines crossing the map = day/night terminator
Yellow star = Sub-solar point
The data block in the bottom left corner includes the date and the start/end times for the 30 minute period of the current map in UTC.