Solar Flux Index (SFI)
132
Higher values often support better upper-HF propagation.
M7COV · Amateur Radio Shack
📡 Live HF Conditions
Check the latest solar and HF propagation indicators before you call CQ, chase DX or fire up FT8. Use these figures as a guide — actual band openings depend on your location, antenna, time of day and path.
Solar-terrestrial feed
available
Current solar indicators
Sunspot Number
67
A broad indicator of solar activity.
A-index
6
Lower values generally indicate a quieter geomagnetic field.
K-index
0
Lower is calmer; higher values can disturb HF paths.
HF band conditions
| Band group | Day | Night |
|---|---|---|
| 80m-40m | Fair | Good |
| 30m-20m | Good | Good |
| 17m-15m | Good | Good |
| 12m-10m | Fair | Poor |
These are broad propagation estimates for grouped bands, not a guarantee that a particular frequency or path will be open.
More space-weather readings
X-ray level
B7.2 — strong solar flares can cause short-lived HF radio blackouts, particularly on the sunlit side of Earth.
Geomagnetic field
INACTIVE — a summary of the current geomagnetic state reported by the feed.
Signal noise
S0-S1 — an estimated radio-noise indicator from the source feed.
Last feed update:
18 Oct 2026 1707 GMT.
Local cache age:
5 minute(s).
The feed is checked no more than once per hour.
How to use these readings
For daytime DX
Check the daytime estimates for the higher bands. When conditions are favourable, 20m, 15m or 10m may offer worthwhile DX opportunities — listen and test the path.
For evening operating
Compare the night estimates. Lower bands such as 40m and 80m can be useful after dark, depending on local noise and the distance you want to work.
For FT8
Propagation indicators can help you choose a band to try, but they do not show real-time FT8 activity. Check your waterfall and the spots or reports available to you.
Trust your receiver
A band marked Poor can still produce contacts, while a Good prediction cannot guarantee a contact. Listen first, then give it a try!
Solar-terrestrial data and calculated band conditions courtesy of
HamQSL.com / N0NBH.
Predictions are indicative, and real-world propagation can differ.