NOAA SOLAR DATA | 2026-05-28 16:00:02 UTC
UNSETTLED
MUF 26.8 MHz | S/N S2-3
142
SOLAR FLUX INDEX
GOOD
11
A-INDEX
QUIET
3
K-INDEX
ACTIVE
B8.3
X-RAY
NOMINAL
213.4
ELECTRON FLUX
ACTIVE
3.5
PROTON FLUX
NORMAL
PARTICLE RADIATION
26.8
MHz
MAX USABLE FREQ
HF OPEN
G0
GEOMAG STORM
NONE
R0
RADIO BLACKOUT
NONE
NOAA STORM SCALES
G0
GEOMAG FORECAST
NONE
R0
BLACKOUT FORECAST
NONE
24H FORECAST
HF BAND CONDITIONS
600m
92
DAY
GOOD
81
NIGHT
GOOD
160m
88
DAY
GOOD
78
NIGHT
FAIR
80m
85
DAY
GOOD
77
NIGHT
FAIR
40m
83
DAY
GOOD
75
NIGHT
FAIR
20m
78
DAY
FAIR
70
NIGHT
FAIR
10m
61
DAY
FAIR
51
NIGHT
FAIR
6m
50
DAY
FAIR
39
NIGHT
POOR
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes