Grid GH40 Band Conditions — South America
Localized HF conditions for Maidenhead locator GH40. Coordinating at -19.50°, -51.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
GH40 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.
From South America operating area, work the 09:58 UTC and 21:04 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses GH40.
10m is the headline band right now, with 20m as the dependable fallback if conditions soften.
This square sits in South America footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- tropical
- Local phase
- Daylight
- Aurora exposure
- low at this latitude
- Grayline
- 09:58 UTC / 21:04 UTC
- Best high band
- 10m
- Nearest city
- South America operating area
● Local Band Quality Scorings
Use this local score for GH40, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from GH40 — South America operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from GH40 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| Southern Africa | 4,858 mi | 112° | 40m, 20m, 80m | Open now |
| North America | 5,056 mi | 324° | 10m, 15m, 20m | Open now |
| Europe | 6,068 mi | 34° | 40m, 20m, 80m | Open now |
| Oceania | 8,742 mi | 203° | 10m, 15m, 20m | Open now |
| South Asia | 9,152 mi | 78° | 40m, 20m, 80m | Open now |
| East Asia / Japan | 11,173 mi | 336° | 10m, 15m, 20m | Open now |
● Band-by-Time Plan for GH40
A planning heuristic for the local day at GH40, built from sunrise 09:58 UTC, sunset 21:04 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching GH40 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in GH40, GH41, GG49, GH50, GH30. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
No contest event is currently loaded. For planning from GH40, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids