Sun Images for Past 72 Hours
Sun images are temporarily unavailable because the Helioviewer API is currently not accessible.
For more information, see the Helioviewer maintenance page.
๐ Propagation Summary: HF propagation is currently moderate to good on the higher bands, with solar flux at 146 and a sunspot number of 123 supporting reliable daytime operation on 20m, 17m, and 15m. The K-index is at 3, indicating only slightly unsettled geomagnetic conditions, so most HF bands remain usable, though some minor fading or noise may occur, especially at higher latitudes. 10m and 12m are fair during the day but weaken at night, while 80m and 40m are best after dark. Operators should expect solid regional and some DX opportunities on the upper bands, with lower bands favoring local and NVIS contacts at night.
๐ก Operator Tips
- Focus on 20m, 17m, and 15m for DX and long-haul contacts, especially during daylight hours.
- 10m and 12m may open for short periods during middayโtry FT8 or CW for weak-signal work.
- 80m and 40m are best for local/regional QSOs after sunset; daytime conditions are poor.
- Use digital modes (FT8, PSK31) to maximize weak signal performance, especially on higher bands.
- Monitor the K-index: If it rises above 4, expect increased noise and possible blackouts on HF.
- For VHF/UHF: Aurora activity is low, so no major auroral propagation is expected.
โฐ Best Operating Times
- 80m & 40m: Best at night and early morning (local time)
- 20m, 17m, 15m: Best from late morning through late afternoon
- 12m & 10m: Try midday to early afternoon for possible short openings
- DX: Focus on grayline periods (sunrise/sunset) for enhanced long-path propagation
๐ DX Opportunities
- Grayline paths are favorable on 20m and 17mโcheck for enhanced signals at sunrise/sunset.
- 15m is open for intercontinental DX during the day, especially on east-west paths.
- 10m/12m may provide sporadic E or F2 openingsโwatch for short, strong DX bursts.
- No significant aurora or polar path openings expected due to low auroral activity.
๐ป Band-by-Band Analysis
| Band | Morning | Day | Evening | Night |
|---|---|---|---|---|
| 80m | ๐ Fair | ๐ด Poor | ๐ก Good | ๐ก Good |
| 40m | ๐ Fair | ๐ด Poor | ๐ก Good | ๐ก Good |
| 20m | ๐ก Good | ๐ก Good | ๐ก Good | ๐ก Good |
| 17m | ๐ก Good | ๐ก Good | ๐ก Good | ๐ก Good |
| 15m | ๐ก Good | ๐ก Good | ๐ก Good | ๐ก Good |
| 12m | ๐ Fair | ๐ Fair | ๐ด Poor | ๐ด Poor |
| 10m | ๐ Fair | ๐ Fair | ๐ด Poor | ๐ด Poor |
- Best bands today: 20m, 17m, and 15m are consistently good throughout the day and into evening, making them the top choices for both DX and regional work.
- 10m and 12m: Only fair during daylight, closing at nightโwatch for brief midday openings.
- 80m and 40m: Poor during the day, but fair to good after sunset for local and regional contacts.
๐ Current Solar Activity
Solar Activity Metrics
K-index
Solar Flux (10.7cm)
Sunspot Number
- K-index (geomagnetic activity): 3 (slightly unsettled, minor HF noise possible, but no major disruptions)
- Solar Flux (10.7cm): 146 (supports good HF propagation, especially on higher bands)
- Sunspot Number: 123 (healthy level, helps maintain ionization for DX)
- Space Weather Overview: Moderate solar activity, with a C1.4 X-ray flare recently, but no major disturbances.
๐ Geomagnetic Conditions
- Recent K-index trend: Stable to slightly unsettled over the past 24 hours, with values hovering around 3. No major geomagnetic storms detected, so HF propagation remains generally reliable.
- Impact: Minor fading or noise may occur, especially at higher latitudes, but no widespread blackouts expected.
๐ Space Weather Details
Space Weather Dashboard
X-ray Activity
Solar Wind Speed
Aurora Activity
- X-ray Activity: C1.4 (minor flare activity; unlikely to cause HF blackouts, but keep an ear out for sudden fadeouts)
- Solar Wind: 409 km/s (moderate speed; not likely to trigger geomagnetic storms)
- Particle Environment: Electron flux at 3010 (slightly elevated, could cause minor absorption at polar paths)
- Aurora Activity: Level 4 (low; auroral propagation on VHF/UHF unlikely)
- Helium Line: 119.6 (steady, indicating stable solar output)
๐ก Propagation Timeline & Technical Details
Propagation Quality Timeline (24 Hours)
- Recent solar flux and sunspot trends: Solar flux has decreased slightly from a winter peak (160) to current levels (130-146), and sunspot numbers have also dipped from 124 to 85-123. This means upper HF bands are still open, but not at their absolute bestโexpect good, but not exceptional, DX conditions.
Solar Activity Trends (6 Months)
๐ฎ 3-Day Forecast