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Scale [ | ]

Status ->

The horizontal axis
  Click any Month/Day label on the horizontal axis to zoom in to that day.
  eg. clicking '10/09' would zoom to October 9th.

Go back in time
  Click the 'Choose period' text to go back in time.

Directionality
  Spots in both directions are queried by default.
  Click the text 'Choose location# 1' or 'Choose location# 2' to set a location as the transmit location.
  The colours change to red and green as indicators.
  Click a green label to reverse directionality.
  Click a red label to cancel directionality.

Chart line Data Points
  Mouse over the Band Legend on the left of the chart window to highlight each chart line and its data points.   Mouse over the data points on the chart lines to see their spot count.

Link to a Chart
  Example:   https://wspr.rocks/propagation/?action=chart&loc1=EU&loc2=VK&p=30
  The loc1 and loc2 values can be seen at the bottom of this page using your browser's 'view source' feature.
  p is the period value, eg. p=30 generates a 30 day chart.   p=24 generates a 24 hour chart.

Advanced search
You can add and clauses like [] or [] etc
[]   Click any period to execute your advanced text and refresh the chart.