What grid square is the BL31 operating area?

BL31 is the live DXRadar reference square for the BL31 operating area. The exact portable or home QTH may vary within the square, but this page tracks the center of BL31 for planning propagation.

How do I find my grid square?

Use a Maidenhead grid lookup from your GPS coordinates or street address, then compare that grid with the nearby squares linked on this page. A 4-character grid is enough for most HF planning.

What bands are open in BL31 right now?

BL31 is currently rated FAIR. The best bands right now are 10m, 12m, 15m, 17m, 20m, with 10m as the main band to watch first.

HomeSFI --K ---:-- UTC

Grid BL31 Band Conditions

Localized HF conditions for Maidenhead locator BL31. Coordinating at 21.50°, -153.00°. Updated with real-time telemetry from NOAA and DX cluster reports.

BL31 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.

Regional Radar

SFI

137

K-Index

3 Kp

Center Coords

21.5, -153.0

Local Phase

Daylight

Grayline window

Sunrise 15:41 UTC

Sunset 04:57 UTC from BL31

From the BL31 operating area, work the 15:41 UTC and 04:57 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses BL31.

Best band now

10m

10m is the headline band right now, with 20m as the dependable fallback if conditions soften.

Closest operating hub

the BL31 operating area

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: tropical
Local phase: Daylight
Aurora exposure: low at this latitude
Grayline: 15:41 UTC / 04:57 UTC
Best high band: 10m
Nearest city: the BL31 operating area

● Local Band Quality Scorings

Use this local score for BL31, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.

10m

EXCELLENT

15m

EXCELLENT

20m

GOOD

40m

POOR

80m

POOR

● Best DX Windows from BL31 — the BL31 operating area

Great-circle distance, short-path beam heading, the bands most likely open right now from BL31 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
North America	3,441 mi	56°	10m, 15m, 20m	Open now
East Asia / Japan	4,213 mi	300°	10m, 15m, 20m	Open now
Oceania	5,195 mi	229°	10m, 15m, 20m	Open now
South America	6,908 mi	102°	10m, 15m, 20m	Open now
Europe	7,388 mi	11°	10m, 15m, 20m	Open now
South Asia	7,872 mi	308°	10m, 15m, 20m	Open now
Southern Africa	12,120 mi	169°	10m, 15m, 20m	Open now

● Band-by-Time Plan for BL31

A planning heuristic for the local day at BL31, built from sunrise 15:41 UTC, sunset 04:57 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.

Dawn grayline

around 15:41 UTC

40m · 30m · 20m

Grayline enhancement — low bands reach long distances as the terminator passes.

Morning

after 15:41 UTC

20m · 15m · 10m

High bands rising with the sun; check 10m for DX.

Midday

local noon

10m · 15m · 20m

Peak high-band window — 10m and 15m open widest.

Dusk grayline

around 04:57 UTC

20m · 40m

Second grayline peak — 20m holds, then hands off to 40m.

Night

after 04:57 UTC

40m · 80m

Low bands own the darkness — 40m for DX, 80m regional.

Recent local activity

Spots touching BL31 and the adjacent squares

These are the newest 10m, 15m, and 20m reports where one side of the path sits in BL31, BL32, BL30, BL41, BL21. This gives the page unique, local context instead of a generic solar snapshot.

No fresh PSKReporter paths are cached for the immediate BL31 footprint right now. That usually means you should widen the search to the nearest regional hubs below or fall back to 20m/40m for the next operating window.

Top DX targets

Where this grid is reaching right now

No outbound targets were strong enough to rank from the current cache. Check back after the next PSKReporter refresh or switch to the regional grids below.

Contest preview

Next major contest outlook

Worked All Europe - SSB starts Sat, 12 Sep 2026 00:00:00 GMT. Current forecast from BL31: 10m EXCELLENT, 15m EXCELLENT, 20m GOOD. Current solar conditions (SFI 137, K 3) favor 10m, 15m, 20m for this contest weekend.

Open contest calendar

Nearby grids