NOAA SOLAR DATA | 2026-04-28 12:00:03 UTC
VERY QUIET
MUF 26.8 MHz | S/N S0-1
142
SOLAR FLUX INDEX
GOOD
7
A-INDEX
QUIET
1
K-INDEX
QUIET
C1.7
X-RAY
MINOR FLARE
150.8
ELECTRON FLUX
ACTIVE
1.1
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
R2
BLACKOUT FORECAST
MODERATE
24H FORECAST
HF BAND CONDITIONS
600m
86
DAY
GOOD
82
NIGHT
GOOD
160m
81
DAY
GOOD
79
NIGHT
FAIR
80m
79
DAY
FAIR
77
NIGHT
FAIR
40m
77
DAY
FAIR
76
NIGHT
FAIR
20m
72
DAY
FAIR
71
NIGHT
FAIR
10m
55
DAY
FAIR
52
NIGHT
FAIR
6m
44
DAY
POOR
40
NIGHT
POOR
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes