Amateur Radio Propagation Report

📋 Propagation Summary

Today’s HF propagation is being shaped by moderate solar activity and recently unsettled geomagnetic conditions. The solar flux is at 124 and the sunspot number is 94, which is enough to support some daytime activity on the higher bands, but not at peak levels. The K-index has dropped from stormy levels but remains elevated (currently 4.33), so expect variable band performance and occasional shortwave fadeouts, especially at higher latitudes. Aurora activity is modest, but recent geomagnetic storms may still cause absorption and flutter on polar and transpolar paths. Operators should expect fair to poor conditions on most bands, with the best chances for QSOs on 20m–17m during daylight and 40m–80m at night.

💡 Operator Tips

• Use digital modes (FT8, FT4, RTTY) for better results on marginal bands, as they can punch through weak or noisy conditions.
• Short skip may be unreliable on 10m–12m due to fair/poor conditions; focus on longer paths or try during local midday.
• For DX, target 20m and 17m during daylight, and 40m at night for best results.
• Lower your noise floor: Use narrow filters and noise reduction, especially on 80m/40m where geomagnetic absorption is higher.
• Monitor the K-index: If it drops further, expect rapid improvement, especially on higher bands.
• If you’re in northern latitudes, watch for brief auroral openings on VHF/UHF, but expect HF flutter and absorption.

⏰ Best Operating Times

🌍 DX Opportunities

• Grayline paths: Watch for enhanced propagation on 40m and 20m during local sunrise and sunset.
• 20m and 17m: Still offer the best shot for intercontinental DX, especially east-west.
• Auroral latitudes: Some VHF aurora possible, but HF may be degraded.
• Special events: No major solar flares, so no HF blackouts expected, but keep an ear out for sudden band openings if the K-index drops.

📻 Band-by-Band Analysis

Currently, 20m and 17m are your best bets for daytime DX, with 15m offering some opportunities when the solar flux is strong enough. 40m and 80m will be most reliable at night, but expect only fair conditions due to lingering geomagnetic disturbances. 10m and 12m are mostly marginal—try digital modes or check for brief openings during local noon.

📊 Current Solar Activity

• K-index: 4.33 – Unsettled to active; recent geomagnetic storms have subsided, but conditions are still variable.
• Solar Flux (10.7cm): 124 – Moderate; supports fair propagation on mid and some high bands, but not optimal for 10m/12m.
• Sunspot Number: 94 – Moderate; enough for some F-layer support, but lower than recent months.
• Space Weather Overview: No major flares, but elevated solar wind and geomagnetic activity continue to impact propagation, especially on polar and high-latitude paths.

📈 Geomagnetic Conditions

Over the past 48 hours, the K-index spiked into storm levels (6–7) but has since dropped to unsettled (4–5). This trend suggests gradual improvement, but HF bands are still recovering from recent geomagnetic storms. If the K-index continues to decrease, expect better conditions, especially on higher bands. For now, absorption and fading may still affect polar and transatlantic paths.

🌟 Space Weather Details

• X-ray Activity: B6.6 – Low-level background; no major HF blackouts expected.
• Solar Wind: 623 km/s – Elevated; can drive further geomagnetic activity and absorption, especially at high latitudes.
• Particle Environment: Electron flux 2440, Proton flux 177 – Slightly elevated, which may cause minor polar absorption and increased noise.
• Aurora Activity: Level 3 – Some auroral activity possible; VHF/UHF aurora scatter may occur, but HF will see flutter and absorption near auroral zones.
• Helium Line: 113.6 – Indicates moderate solar activity; no major trend shifts.

📡 Propagation Timeline & Technical Details

Recent months show a declining trend in both solar flux and sunspot numbers, from highs near 160/124 down to current values around 124/94. This means the upper HF bands (15m–10m) are less likely to open except during brief enhancements. The recent geomagnetic storm (K-index 6–7) caused significant shortwave absorption, but as the K-index falls, expect gradual improvement—especially on 20m and below.

🔮 3-Day Forecast

• HF conditions should slowly improve as geomagnetic activity settles, but expect only fair propagation, especially on higher bands.
• Best bands: 20m and 17m for daytime DX, 40m and 80m for night.
• Worst bands: 10m and 12m likely to remain poor except for brief, sporadic openings.
• Watch for: Rapid improvement if the K-index drops below 3; check for auroral VHF/UHF openings in northern regions.
• No major solar flares expected, so no sudden HF blackouts, but keep an eye on the K-index for further geomagnetic activity.