DXAlert – Propagation Conditions
Stay ahead of band openings with real-time solar and geomagnetic data from
NOAA Space Weather Prediction Center.
Whether you're a CB radio operator, ham radio enthusiast, or just curious
about propagation, DXAlert gives you the key numbers you need — updated live,
straight from official NOAA sources.
What DXAlert monitors:
• Solar Flux Index (SFI) — how active the Sun is today
• Planetary K-index — geomagnetic disturbance level
• Estimated A-index — daily geomagnetic activity
• Sporadic-E seasonal likelihood — is Es season active?
Bands covered:
• CB (27 MHz) — Sporadic-E & F2 skip
• 6m — Es + ionospheric conditions
• 2m & 70cm — ionospheric activity context
Features:
• Live dashboard with visual condition gauge
• All-bands overview at a glance
• Historical SFI and Kp charts (up to 30 days)
• Background alerts when conditions exceed your thresholds
• No account required, no subscription, no ads
• Data: NOAA SWPC (free, public)
Honest about limitations: Sporadic-E cannot be reliably predicted from solar
data — DXAlert shows a seasonal climatology estimate, not a live Es detection.
For confirmed openings, check DX cluster spots and beacon monitoring.
Also from DameAppku: TropoDX — tropospheric ducting forecasts for 2m and 70cm.
