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 moderate solar activity and quiet geomagnetic conditions. The solar flux is at 93 (recently trending lower), and the K-index is at 1, indicating very stable geomagnetic conditions—great news for lower band reliability. Sunspot numbers have decreased compared to previous months, which means high bands (12m, 10m) are mostly underperforming, but 20m and 40m remain reliably open for regional and some DX contacts. Expect good nighttime conditions on 80m and 40m, while daytime operation will be best on 20m and 17m. Keep an eye on grayline times for enhanced DX opportunities.

💡 Operator Tips

• Focus on 20m and 40m for consistent contacts throughout the day and night.
• Use digital modes (FT8, PSK31) to maximize weak signal performance, especially on higher bands where conditions are poor.
• For DX, operate during local sunrise/sunset (grayline) on 40m and 20m.
• Contesters: Concentrate efforts on 20m/40m during the day and 80m at night for the best rates.
• For QRP and portable ops, stick to 40m and 20m for reliable results.
• Antenna: Vertical or dipole antennas will perform well on 20m/40m; consider low-noise receiving antennas for 80m nighttime work.

⏰ Best Operating Times

• 80m/40m: Best at night and early morning (local time)
• 20m: Good all day, especially late morning through afternoon
• 17m/15m: Fair during midday, limited DX potential
• 12m/10m: Poor most of the day and night; check for brief openings around local noon
• Grayline (sunrise/sunset): Enhanced DX on 40m and 20m

🌍 DX Opportunities

• Grayline propagation on 40m and 20m is your best bet for long-haul DX, especially east-west paths.
• 20m may support transcontinental and some intercontinental paths during daylight.
• 80m/40m: Look for strong regional and some DX openings during local evening and pre-dawn.
• Aurora activity is low, so northern latitude VHF/UHF auroral propagation is not expected.
• No major solar events or special propagation phenomena are forecasted.

📻 Band-by-Band Analysis

Analysis:
20m is the most reliable band for all-day operation, with 40m and 80m performing best at night and in the early morning. 17m and 15m may yield some contacts, especially around midday, but expect only fair conditions. 12m and 10m are largely closed, with little chance for sustained propagation. For the best results, concentrate on 20m and 40m, and check 80m after sunset for strong regional signals.

📊 Current Solar Activity

• K-index: 1 (very quiet geomagnetic field; minimal disruptions, stable HF conditions)
• Solar Flux: 93 (moderate, but lower than recent months; favors lower bands, limits high-band openings)
• Sunspot Number: 42 (significantly down from previous months, reducing high-band propagation)
• Space Weather: No major flares or disturbances; X-ray background is low (B2.7)

📈 Geomagnetic Conditions

• The K-index has remained low and stable over the past 24 hours, indicating quiet geomagnetic conditions.
• No recent geomagnetic storms or disturbances; conditions are improving compared to any recent unsettled periods.
• Expect minimal absorption and good reliability on lower HF bands.

🌟 Space Weather Details

• X-ray Activity: B2.7 (low; no risk of HF blackouts or sudden ionospheric disturbances)
• Solar Wind: 575.6 km/s (moderately elevated, but not causing geomagnetic issues due to low K-index)
• Particle Environment: Electron flux at 2060 (moderate; no significant impact on HF)
• Aurora Activity: Level 1 (very low; auroral propagation on VHF/UHF is not expected)
• Helium Line: 101.6 (steady; no major solar trend shifts detected)

📡 Propagation Timeline & Technical Details

• Recent solar flux has decreased from ~160 (Dec-Jan) to 130 (March) and now sits at 93, reflecting a downward trend in solar activity.
• Sunspot numbers have also declined from over 120 to the low 80s, now at 42, which explains the poor high-band conditions.
• Historical data shows we are past the recent solar peak, so expect generally lower high-band activity until the next solar uptick.

🔮 3-Day Forecast

• Expect continued quiet geomagnetic conditions (low K-index) and moderate solar activity.
• 20m and 40m will remain the most reliable bands for both local and DX contacts.
• High bands (15m, 12m, 10m) will likely stay poor, with only brief or sporadic openings possible.
• No major space weather alerts or warnings are in effect.
• Continue to monitor for any sudden solar events, but stable conditions are forecast for the coming days.