Grid JB25 Band Conditions
Localized HF conditions for Maidenhead locator JB25. Coordinating at -74.50°, 5.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
JB25 conditions are FAIR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 137.
From the JB25 operating area, work the no sunrise — polar night and no sunset — polar night grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses JB25.
10m is the headline band right now, with 20m as the dependable fallback if conditions soften.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- high-latitude
- Local phase
- Daylight
- Aurora exposure
- watch during geomagnetic storms
- Grayline
- no sunrise — polar night / no sunset — polar night
- Best high band
- 10m
- Nearest city
- the JB25 operating area
● Local Band Quality Scorings
Use this local score for JB25, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from JB25 — the JB25 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from JB25 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 | 3,435 mi | 25° | 40m, 20m, 80m | Open now |
| South America | 4,733 mi | 292° | 10m, 15m, 20m | Open now |
| Oceania | 5,044 mi | 149° | 40m, 20m, 80m | Open now |
| South Asia | 7,377 mi | 68° | 40m, 20m, 80m | Open now |
| Europe | 8,605 mi | 4° | 40m, 20m, 80m | Open now |
| North America | 9,036 mi | 270° | 10m, 15m, 20m | Open now |
| East Asia / Japan | 9,366 mi | 122° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for JB25
A planning heuristic for the local day at JB25, built from sunrise no sunrise — polar night, sunset no sunset — polar night, 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 JB25 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in JB25, JB26, JB24, JB35, JB15. 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 JB25, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links