Amateur Radio Propagation Report

Sun Images for Past 72 Hours

Images copyrighted by the SDO/NASA and Helioviewer project

📋 Propagation Summary:
HF propagation today is shaped by a moderate solar flux (around 105) and a declining sunspot number (~60), with quiet geomagnetic conditions (K-index at 0). Expect good performance on 80m, 40m, and 20m throughout the day and night, while higher bands (17m, 15m) offer only fair conditions and 12m/10m remain poor. No major solar flares or geomagnetic storms are present, so noise levels should be low and band stability high. For best results, focus on the lower HF bands for both local and DX contacts, and keep an eye on grayline openings for enhanced propagation.

💡 Operator Tips

• Prioritize 80m, 40m, and 20m for reliable contacts—these bands are your best bet today.
• Use digital modes (FT8, PSK31) on higher bands (17m, 15m, 12m, 10m) to maximize weak signal work.
• Monitor grayline times for possible short DX windows, especially on 20m and 40m.
• Vertical antennas and low-noise receiving setups will help pull in weaker signals, especially as SFI and sunspots are on the low side.
• Contesters and DXers: Focus on 20m for daytime DX and 40m/80m for evening/nighttime long-haul paths.

⏰ Best Operating Times

• 80m & 40m: Excellent all night, good during the day—best for local/regional and nighttime DX.
• 20m: Good sunrise to sunset, with possible evening grayline DX.
• 17m & 15m: Fair mid-morning to late afternoon; look for brief DX windows.
• 12m & 10m: Poor all day—sporadic E or rare openings possible, but not reliable.

🌍 DX Opportunities

• Grayline DX: Watch for enhanced propagation on 40m and 20m during sunrise and sunset.
• 20m: Best band for intercontinental DX during daylight, especially east-west paths.
• 17m/15m: Occasional short-path DX possible midday, but conditions are only fair.
• Aurora: Low aurora activity (level 2) means VHF/UHF auroral propagation is unlikely.
• Special Events: No major solar events or alerts—expect stable, predictable band behavior.

📻 Band-by-Band Analysis

Analysis:
80m, 40m, and 20m are consistently good throughout the day and night, making them the top choices for both local and long-distance contacts. 17m and 15m are only fair, so expect limited DX and weaker signals—use digital modes for best results. 12m and 10m are poor and unlikely to support reliable propagation except for rare, short-lived openings.

📊 Current Solar Activity

• K-index: 0 — Very quiet geomagnetic field, ideal for low noise and stable HF propagation.
• Solar Flux (10.7cm): 105 — Moderate level, supports good lower band activity but limits higher band openings.
• Sunspot Number: 60 — Below average, indicating we're in a declining phase of solar activity; expect fewer high-band openings.
• Space Weather Overview: No significant flares or disturbances; X-ray flux is low (B2.1), so HF blackouts are not expected.

📈 Geomagnetic Conditions

• Recent K-index trend: Stable at 0 for the past 24 hours, indicating quiet geomagnetic conditions.
• Impact: Low K-index means minimal auroral absorption and low noise, especially beneficial for low-band operations. No signs of worsening or storm activity.

🌟 Space Weather Details

• X-ray Activity: B2.1 (low)—No risk of HF blackouts; solar flare activity is minimal.
• Solar Wind: 288 km/s (low)—Stable geomagnetic field, no increased absorption or auroral activity.
• Particle Environment: Electron flux: 1840 (moderate); Proton flux: 33 (quiet)—No significant impact on HF propagation.
• Aurora Activity: Level 2 (very low)—Auroral propagation on VHF/UHF is not expected; northern operators will see quiet bands.
• Helium Line: 105.0—Consistent with moderate solar activity, no sharp increases or flare signatures.

📡 Propagation Timeline & Technical Details

• Recent Solar Trends:
  Over the past 6 months, solar flux has steadily declined from 138 in June to 105 in September, and sunspot numbers have dropped from 101 to 60. This trend explains the current good conditions on lower bands and poor performance on higher bands.

🔮 3-Day Forecast

• Expect continued moderate solar flux and low geomagnetic activity.
• 80m, 40m, and 20m will remain the best choices for reliable contacts.
• Higher bands (17m, 15m, 12m, 10m) will stay limited unless a surprise solar uptick occurs.
• No alerts or warnings are in effect; stable propagation is expected for the next several days.
• Watch for grayline enhancements and use digital modes to maximize DX opportunities.