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Solar RF Conditions
Real-time and forecast amateur-radio propagation indicators from NOAA SWPC. The Kp index drives geomagnetic storm absorption of HF signals; the Solar Flux Index drives ionospheric density and Maximum Usable Frequency; the A-Index is the daily geomagnetic summary. HF band ratings are an estimate derived from these values.
Location: 39.96, -83.00 (browser)
Radio Propagation
Estimated · UTCSolar Flux Index
109 sfu
Moderate
A-Index
7
Quiet
HF Band Conditions
Night · Overall: Poor
| Band | Day | Night |
|---|---|---|
| 80m | Poor | Fair |
| 40m | Fair | Good |
| 30m | Fair | Good |
| 20m | Good | Poor |
| 17m | Good | Poor |
| 15m | Good | Poor |
| 12m | Good | Poor |
| 10m | Fair | Poor |
Updated 10:44 UTC
Radio Propagation · Predicted
For Sep 27 16:51 UTCSolar Flux Index
109 sfu
(est.)
Moderate
A-Index
7
(forecast)
Quiet
HF Band Conditions
Day · Overall: Poor
| Band | Day | Night |
|---|---|---|
| 80m | Poor | Fair |
| 40m | Fair | Good |
| 30m | Fair | Good |
| 20m | Good | Poor |
| 17m | Good | Poor |
| 15m | Good | Poor |
| 12m | Good | Poor |
| 10m | Fair | Poor |
Updated 10:44 UTC
Kp Index Scale
0
Quiet
1
Quiet
2
Quiet
3
Unsettled
4
Active
5
Minor Storm
G1
6
Moderate Storm
G2
7
Strong Storm
G3
8
Severe Storm
G4
9
Extreme Storm
G5
Data: NOAA Space Weather Prediction Center. HF band conditions are an estimate derived from SFI and Kp; not a Maximum Usable Frequency prediction.