Grid JA57 Band Conditions
Localized HF conditions for Maidenhead locator JA57. Coordinating at -82.50°, 11.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
JA57 conditions are GOOD. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 148.
From the JA57 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 JA57.
Night operation should keep 20m on watch and move to 40m as the path darkens.
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
- Darkness
- Aurora exposure
- watch during geomagnetic storms
- Grayline
- no sunrise — polar night / no sunset — polar night
- Best high band
- 10m
- Nearest city
- the JA57 operating area
● Local Band Quality Scorings
Use this local score for JA57, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from JA57 — the JA57 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from JA57 to each DX region at SFI 148 / 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 | 3,923 mi | 16° | 40m, 20m, 80m | Open now |
| Oceania | 4,544 mi | 141° | 40m, 20m, 80m | Open now |
| South America | 5,005 mi | 289° | 40m, 20m, 80m | Open now |
| South Asia | 7,525 mi | 64° | 40m, 20m, 80m | Open now |
| East Asia / Japan | 9,000 mi | 122° | 40m, 20m, 80m | Open now |
| North America | 9,056 mi | 257° | 40m, 20m, 80m | Open now |
| Europe | 9,155 mi | 359° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for JA57
A planning heuristic for the local day at JA57, built from sunrise no sunrise — polar night, sunset no sunset — polar night, SFI 148, 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 JA57 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in JA57, JA58, JA56, JA67, JA47. 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
Worked All Europe - SSB starts Sat, 12 Sep 2026 00:00:00 GMT. Current forecast from JA57: 10m POOR, 15m POOR, 20m FAIR. Current solar conditions (SFI 148, K 3) favor 10m, 15m, 20m for this contest weekend.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links