Ham Stats¶
HF propagation predictions trained on 14 billion real observations — not theory, not opinions.
Ham Stats provides live HF propagation intelligence for amateur radio operators. Everything on this site is derived from measured radio observations — WSPR beacons, Reverse Beacon Network skimmers, PSK Reporter reception reports, and contest QSOs — combined with real-time solar conditions from NOAA.
- Predictions — Which bands and modes can reach your target right now
- Band Activity — What's actually being heard across the HF spectrum
- Solar Conditions — Current SFI, Kp, and their impact on propagation
- Historical Data — Band-by-band trends, contest schedules, and DXpedition tracking
The predictions are powered by IONIS — a physics-constrained neural network trained on one of the largest curated amateur radio propagation datasets we are aware of. For technical details on the model and methodology, see ionis-ai.com.
Updated 21:00 UTC · NOAA SWPC
Band Activity (Last 24 Hours)¶
Which bands had propagation in the last 24 hours, based on spots from all sources. RBN archives lag ~24 hours; zeroes indicate no data in the window, not band closure.
| Band | WSPR Spots | RBN Spots | PSKR Spots | Peak SNR | Status |
|---|---|---|---|---|---|
| 10m | 11,441 | 512 | 1.3M | +90 dB | Strong |
| 12m | 6,906 | 142 | 388,429 | +87 dB | Strong |
| 15m | 25,120 | 1,702 | 6.0M | +87 dB | Strong |
| 17m | 42,770 | 2,840 | 4.7M | +87 dB | Strong |
| 20m | 243,605 | 17,587 | 12.6M | +74 dB | Strong |
| 30m | 112,952 | 3,818 | 2.1M | +63 dB | Strong |
| 40m | 259,194 | 8,511 | 3.7M | +87 dB | Strong |
| 80m | 53,067 | 1,308 | 363,468 | +52 dB | Strong |
| 160m | 11,956 | 515 | 30,528 | +51 dB | Open |
Data Pipeline¶
| Source | Latest Date | Total Rows | Status |
|---|---|---|---|
| WSPR | 2026-05-22 | 11.48B | Current |
| RBN | 2026-05-22 | 2.31B | Current |
| PSK Reporter | 2026-05-23 | 3.46B | Live |
| Contest | Archive | 234.3M | Static |
| Solar | 2026-05-23 | 77,604 | Live |
About This Site¶
Ham Stats is generated every 3 hours from a self-hosted ClickHouse database containing 14+ billion amateur radio propagation observations — one of the largest curated datasets of its kind. No cloud services. No third-party APIs. Every query runs against data we collected and maintain.
The data comes from four independent networks, each measuring a different layer of HF propagation:
- WSPR (11.48B spots, 2008–present) — the SNR floor at minimum power
- Reverse Beacon Network (2.31B spots, 2009–present) — CW/RTTY measured signals
- PSK Reporter (3.46B spots, live since Feb 2026) — FT8/digital operational contacts
- Contest Logs (234.3M QSOs, 2005–present) — the SSB/RTTY ceiling at contest power
Solar indices (SFI, Kp, SSN) are joined at 3-hour resolution so every propagation measurement has its solar context.
This site is a product of the IONIS Project — the Ionospheric Neural Inference System.
The logs were speaking for decades, but nobody was listening. Now we're listening — and we're publishing what we hear.