PropNET Sporadic E Animations

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These maps include data provided by the amateur radio PropNET project. Propagation paths reported by PropNET have been filtered by path length and frequency to include only those that are probably due to sporadic E propagation.

Paths reported over the last 24 hours from all PropNET sites may be viewed here. Pins on the map represent the amateur band being used (e.g., "10" for 10 meters, 28.118 MHz), "L" for lurkers (receive-only stations,) or "N" for non-PropNET transmissions that have been detected and identified on the PropNET frequencies.

Current PropNet Es Animation

The map below shows the location of any sporadic E (green squares) inferred from PropNet reports for the last 4 hours. The terminator may be seen moving across the map at dawn and dusk. A similar map for the last 24 hours is also available.

To show up on the map, the sporadic E generally has a critical frequency greater than 4 MHz. For HF communicators, sporadic E in the vicinity of a path of interest may indicate enhanced single-hop paths at much higher than expected frequencies (e.g, 30-50 MHz.) However, it may also invalidate predictions by standard propagation forecast programs which do not account for sporadic E; for example, it may block F-region paths, and force longer D-region transits, resulting in much lower signal strengths than expected at lower frequencies.

Monthly PropNet Es Animation

Summary animations listed below show the probable sporadic E paths day-by-day for a given month.