Amateur Radio Propagation Report

Sun Images for Past 72 Hours

Images copyrighted by the SDO/NASA and Helioviewer project

📋 Propagation Summary: Today’s HF propagation is looking very promising for most amateur operators! With a solar flux of 203 and a sunspot number of 101, expect strong daytime performance on the higher bands (20m–10m) and classic nighttime reliability on 80m and 40m. The K-index is at 0, meaning geomagnetic conditions are extremely quiet—great news for stable propagation and low noise. Watch for enhanced DX on the higher bands during daylight, but note that 12m and 10m may close after sunset. Now is a great time to chase DX and enjoy reliable contacts across the bands.

💡 Operator Tips

• Take advantage of quiet geomagnetic conditions (K=0) for low noise floors and stable signals, especially on the higher bands.
• Daytime: Focus on 20m, 17m, 15m, 12m, and 10m for long-haul DX. Use SSB, CW, or FT8 for best results.
• Nighttime: Switch to 80m and 40m for regional and intercontinental contacts; digital modes like FT8/FT4 can help pull signals out of the noise.
• Antennas: Use directional antennas on higher bands to maximize DX potential; verticals or dipoles work well on lower bands at night.
• Contesters: Expect fast band changes and good multipliers on 10m–20m during the day. Monitor grayline for surprise openings!

⏰ Best Operating Times

• 80m & 40m: Best after sunset and before sunrise (nighttime, early morning)
• 20m, 17m, 15m: Excellent from mid-morning through late afternoon; still usable into evening
• 12m & 10m: Peak from late morning to late afternoon; likely to close after sunset
• Grayline: Try 40m and 20m at local sunrise/sunset for enhanced DX

🌍 DX Opportunities

• Daytime: Strong worldwide DX on 20m–10m, especially towards equatorial and southern hemisphere paths.
• Grayline: Watch for enhanced openings on 40m and 20m to distant regions at sunrise/sunset.
• Low Bands: 80m and 40m open for transcontinental and intercontinental DX during the night.
• Special Events: With low K-index and high solar flux, rare DXpeditions and contest activity will be easier to work—check clusters for spots!

📻 Band-by-Band Analysis

• Best daytime bands: 20m, 17m, 15m, 12m, 10m all show Good conditions during daylight, with 20m–15m staying open into evening.
• Nighttime: 80m and 40m become the best choices for reliable contacts; higher bands (12m, 10m) close after sunset.
• 20m–15m_ are the most versatile, offering all-day and evening activity.
• 10m and 12m are excellent for DX during the day but fade quickly after sunset.

📊 Current Solar Activity

• K-index: 0 (very quiet) – geomagnetic field is stable, minimizing signal absorption and noise.
• Solar Flux (10.7cm): 203 (very high) – supports strong F-layer ionization, especially on higher bands (20m–10m).
• Sunspot Number: 101 – indicates ongoing solar activity, fueling good propagation.
• Space Weather: No major disturbances; X-ray flux is elevated (C4.0), but no immediate threat of radio blackouts.

📈 Geomagnetic Conditions

• Recent K-index trend: Consistently low (K=0) over the past 24 hours, indicating stable geomagnetic conditions.
• Impact: Expect minimal fading and low noise, especially on polar and trans-equatorial paths. No geomagnetic storms detected or forecast.

🌟 Space Weather Details

• X-ray Activity: C4.0 – moderate solar flare activity; unlikely to cause HF blackouts, but keep an ear out for sudden shortwave fadeouts.
• Solar Wind Speed: 352.8 km/s – moderate speed, not enough to disturb the geomagnetic field.
• Electron Flux: 4300 – slightly elevated, may cause minor absorption on polar paths, but not a major concern.
• Proton Flux: 3050 – normal background levels, no radiation storm risk.
• Aurora Activity: 1 – very low; auroral propagation on VHF/UHF is not expected.
• Helium Line: 123.1 – stable, indicating no sudden changes in solar activity.

📡 Propagation Timeline & Technical Details

• Recent solar flux: After a dip in early spring, solar flux has rebounded, now peaking at 203—the highest in the past 6 months.
• Sunspot trend: Sunspot numbers have recovered from a springtime lull, supporting improved propagation.
• Long-term: The current solar cycle remains active, with conditions likely to stay favorable for HF DX in the coming weeks.

🔮 3-Day Forecast

• Propagation Outlook: Expect continued excellent daytime conditions on 20m–10m, with 15m and 17m especially robust. Nighttime will favor 80m and 40m. No major geomagnetic disturbances are forecast.
• Recommendations: Plan DX and contest operations for daylight hours on higher bands. Watch for grayline enhancements at sunrise/sunset on 40m and 20m. No alerts or warnings—enjoy the bands!