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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.

SFI Kp Conditions

Updated 06:00 UTC · NOAA SWPC

What Can You Work Right Now?

How do these predictions work?

IONIS predicts the ionospheric SNR floor for a given path — it has no concept of your station, antenna, power, or receiver. It answers one question: "Can the ionosphere support this path right now, and how much signal can it carry?"

The model considers five things:

  • Where are the two grid squares? (distance, azimuth, latitude, midpoint)
  • When is it? (hour of day, season, day/night geometry)
  • What frequency?
  • What's the sun doing? (Solar Flux Index → MUF lift)
  • What's the magnetosphere doing? (Kp index → storm penalty)

From these inputs, the model outputs a predicted SNR in dB. That value is then matched against the minimum decode thresholds for each mode — SSB needs a strong signal (+3 dB), while WSPR can pull signals out of the noise floor (-28 dB).

The model was trained on 14+ billion observations across thousands of stations with varying power levels and antennas. Because TX power is not a model input, these station differences become noise that the model averages over — what it learned is the ionosphere itself, not any particular operator's setup.

The predictions represent a typical path — your actual results will vary with your antenna and power, but the path is either open or it isn't.

IONIS predictions from KI7MT (DN13) for the current solar conditions (SFI 113, Kp 1.0).

Destination 10m 12m 15m 17m 20m 30m 40m 60m 80m 160m
Europe (JN48) — — — CW CW CW RTTY RTTY RTTY RTTY
Japan (PM95) — — — RTTY RTTY CW CW CW CW CW
S. America (GG87) — — — FT8 FT8 FT8 CW CW CW CW
Africa (KG33) — — — CW FT8 FT8 FT8 FT8 FT8 FT8
Oceania (QF56) — — — CW CW CW CW CW CW CW
Caribbean (FK68) — — — FT8 FT8 FT8 FT8 CW CW CW

Mode thresholds: SSB ≥ +3 dB, RTTY ≥ -5 dB, CW ≥ -15 dB, FT8 ≥ -21 dB, WSPR ≥ -28 dB. Predictions update every 3 hours with current solar conditions.

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 81,127 0 0 +43 dB Strong
12m 48,341 0 0 +43 dB Open
15m 183,764 0 0 +44 dB Strong
17m 186,793 0 0 +43 dB Strong
20m 1.1M 0 0 +43 dB Strong
30m 567,342 0 0 +42 dB Strong
40m 1.3M 0 0 +44 dB Strong
80m 285,030 0 0 +43 dB Strong
160m 29,386 0 0 +41 dB Open

Data Pipeline

Source Latest Date Total Rows Status
WSPR 2026-09-22 12.68B 14 days behind
RBN 2026-09-21 2.38B 14 days behind
PSK Reporter 2026-09-22 7.13B 15 days behind
Contest Archive 384.4M Static
Solar 2026-09-22 78,338 15 days behind

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 (12.68B spots, 2008–present) — the SNR floor at minimum power
  • Reverse Beacon Network (2.38B spots, 2009–present) — CW/RTTY measured signals
  • PSK Reporter (7.13B spots, live since Feb 2026) — FT8/digital operational contacts
  • Contest Logs (384.4M 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.