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Space Weather
HF and VHF radio conditions for Marion and W8DRH — what the sun and Earth’s magnetic field are doing to the bands right now.
Right Now loading…
solar flux · SFI
—
10.7 cm
sunspot no.
—
SESC
A-index
—
planetary · today
K-index
—
planetary Kp
x-ray
—
GOES long band
solar wind
—
km/s
Bz
—
nT · south = −
NOAA scales
—
R · S · G
times shown in your local time
HF Band Conditions —
| band | day | night |
|---|---|---|
| 80m | — | — |
| 40m | — | — |
| 30m | — | — |
| 20m | — | — |
| 17m | — | — |
| 15m | — | — |
| 12m | — | — |
| 10m | — | — |
VHF & Noise
- VHF aurora —
- 2m E-skip · NA —
- noise —
- MUF —
Good / fair / poor is a broad-brush call for mid-latitude paths, not a promise. Get on the air and see.
Geomagnetic · Aurora —
checking
reading the field…planetary Kp, 3-hour blocks
- 0–3 quiet
- 4 active
- 5 G1
- 6 G2
- 7+ G3–G5
- forecast
Marion sits near 40.6° N. Aurora usually needs Kp 7 or more to show low on the north horizon here.
Solar Activity —
GOES x-ray flux loading…
Flares · Last 7 Days
| peak | class | start → end |
|---|---|---|
| loading… | ||
Solar Flux · 30 Days
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Dig Deeper
- NOAA SWPCspace weather prediction center
- SWPC · radio usersHF/VHF impacts
- D-RAP absorptionHF blackout map
- Aurora · 30 minOVATION forecast
- N0NBH · hamqsl.comsolar-terrestrial data
- SolarHamflares, CMEs, imagery
- KC2G MUF maplive ionosonde MUF
- PSK Reporterwho is hearing what
- DXHeat clusterlive spots
- VOACAP onlinepoint-to-point predictions
Cheat Sheet
- SFI up = higher bands open. 70 is the floor; 150+ and 10m is a party.
- K / A down = quieter. Kp 5+ means storm: polar paths fade, noise climbs.
- X-ray M and X flares cause daytime HF blackouts (NOAA R1–R5) on the sunlit side.
- Bz pointing south (negative) for hours is how storms get started.
For operators · not a forecast product. Raw data from NOAA SWPC; band calls from N0NBH when the station cache is up, otherwise a rule-of-thumb estimate from SFI and Kp (labeled). Times are in your local time.