F4IOZOlivier · radio amateur · JN18FS

Bands …

HF and VHF propagation conditions explained: solar flux, A and K indices (NOAA scales), X-rays, conditions per band by day and by night at your QTH, and the map of what really gets through (PSKReporter, WSPR or RBN), with KC2G's ionospheric model.

Solar and geomagnetic indices

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HF conditions per band

VHF, sporadic E, aurora

50–144 MHz

Quick reading: high SFI and low K: higher bands (10–20 m) open and stable. A high K (G storm) mostly degrades polar paths and may open VHF aurora. An X flare blacks out HF on the day side. On the gray line (sunrise, sunset at the QTH), DX on the lower bands is favoured.

Propagation map

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Source

Model

Path

blob: where it is received (size ∝ number of reports)you are heard (solid line)you hear (dashed)gray lineMUF / foF2 contours (MHz)short path · long path

The blobs group the reports by receiving region: the latest PSKReporter gave (it returns a few thousand, the most recent), or the last quarter of an hour of WSPR and RBN. The lines start from your region: solid, a station near you heard far away; dashed, a distant station heard near you. A callsign typed in « Path » is placed at the centre of its country (no directory); a locator, at its exact place. The analysis crosses the chosen source's measurements with HamQSL's model.

Conditions HamQSL / N0NBH · ionospheric model © KC2G, CC BY 4.0 · reports PSKReporter, wspr.live (WSPRnet data), Reverse Beacon Network · interpretation for guidance only.