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SFI --K ---:-- UTC

40M Band Propagation

40 meter band (7 MHz) propagation. Regional daytime and global nighttime conditions, solar weather impact, and NVIS availability.Currently monitoring real-time activity with an SFI of 137.

SFI
137
MUF Est
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Popular 40M DX Paths

Is 40M Open?Current Band ConditionsListen on KiwiSDRUSA East → JapanUK → USAGermany → BrazilJapan → Australia
Daily forecast

Best Time to Operate Today

EM15 • UTC view
40m: marginal all day
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40m
Band advisor

What Band Should I Use Right Now?

This interactive map shows propagation layers for the selected band, including optional DX spot markers, a propagation heatmap overlay, grayline (day/night terminator), and an amateur radio Maidenhead grid.
10m Tactical View (MapLibre)
Live Data
Loading conditions…
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SFI
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K-Index
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SSN
Push Alerts
Grayline
Calculating window
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Target
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Local time
Shack display mode
This interactive map shows propagation layers for the selected band, including optional DX spot markers, a propagation heatmap overlay, grayline (day/night terminator), and an amateur radio Maidenhead grid.
10m Tactical View (MapLibre)
Heatmap
Clusters
H: 60%C: 50px
Station QTH
DEFAULT
Maidenhead Grid
EM15
LAT: 38.00°LON: -97.00°

Band Conditions

SFI context/What SFI means/Solar Cycle 25 tracker
160m
1.8 MHz
FAIR
80m
3.5 MHz
FAIR
60m
5.3 MHz
FAIR
40m
7 MHz
FAIR
30m(W)
10.1 MHz
FAIR
20m
14 MHz
FAIR
17m(W)
18.1 MHz
FAIR
15m
21 MHz
FAIR
12m(W)
24.9 MHz
FAIR
10m
28 MHz
FAIR
6m
50 MHz
FAIR