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SFI --K ---:-- UTC

Solar Weather History

Track trends that matter for HF operating decisions: SFI/SSN (how “charged” the ionosphere can get), Kp (geomagnetic disturbance), and flare activity (X-ray flux).

SFI
119
SSN
44
K-Index
0
X-Ray
B1.0
24h Trends
Cached history snapshots from the backend (0 points)
Next up: K-index / SFI sparklines (powered by /api/v1/solar/history).
Solar Cycle Comparison
Compare historic cycles (synthetic curves) vs today’s headline numbers.
Current: SFI 119 • SSN 44
Note: These curves are simplified for visualization; use real-time telemetry for current operating decisions.
Band history

Band Condition Time Machine

Rewind recent solar history and inspect how 10m would have scored at your location. This is a heuristic reconstruction from stored SFI, SSN, and K-index snapshots.

How to use these charts

For high bands (especially 10m), look for high SFI/SSN with low Kp. If Kp rises, expect polar paths to degrade first; shift strategy toward lower bands (20m/40m/80m) and check grayline windows.

For flare-related blackouts, watch X-ray class spikes—stronger events can temporarily wipe out HF on the sunlit side. When conditions recover, openings often return quickly.

Data timestamp: 2026-07-20T06:33:35.771Z