NOAA SOLAR DATA | 2026-10-31 19:00:02 UTC
UNSETTLED
MUF 15.7 MHz | S/N S2-3
90
SOLAR FLUX INDEX
FAIR
10
A-INDEX
QUIET
3
K-INDEX
ACTIVE
B2.5
X-RAY
NOMINAL
281.0
ELECTRON FLUX
ACTIVE
74.3
PROTON FLUX
ELEVATED
PARTICLE RADIATION
15.7
MHz
MAX USABLE FREQ
HF OPEN
G0
GEOMAG STORM
NONE
R0
RADIO BLACKOUT
NONE
NOAA STORM SCALES
G1
GEOMAG FORECAST
MINOR
R0
BLACKOUT FORECAST
NONE
24H FORECAST
HF BAND CONDITIONS
600m
78
DAY
FAIR
68
NIGHT
FAIR
160m
75
DAY
FAIR
66
NIGHT
FAIR
80m
73
DAY
FAIR
64
NIGHT
FAIR
40m
71
DAY
FAIR
63
NIGHT
FAIR
20m
60
DAY
FAIR
52
NIGHT
FAIR
10m
40
DAY
POOR
29
NIGHT
CLOSED
6m
39
DAY
POOR
28
NIGHT
CLOSED
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes