NOAA SOLAR DATA | 2026-04-03 07:00:02 UTC
ACTIVE
MUF 26.4 MHz | S/N S3-4
140
SOLAR FLUX INDEX
GOOD
43
A-INDEX
UNSETTLED
4
K-INDEX
ACTIVE
C1.3
X-RAY
MINOR FLARE
165.8
ELECTRON FLUX
ACTIVE
1,579.1
PROTON FLUX
STORM
PARTICLE RADIATION
26.4
MHz
MAX USABLE FREQ
HF OPEN
G2
GEOMAG STORM
MODERATE
R1
RADIO BLACKOUT
MINOR
NOAA STORM SCALES
G2
GEOMAG FORECAST
MODERATE
R2
BLACKOUT FORECAST
MODERATE
24H FORECAST
HF BAND CONDITIONS
600m
77
DAY
FAIR
71
NIGHT
FAIR
160m
74
DAY
FAIR
68
NIGHT
FAIR
80m
72
DAY
FAIR
67
NIGHT
FAIR
40m
70
DAY
FAIR
66
NIGHT
FAIR
20m
65
DAY
FAIR
61
NIGHT
FAIR
10m
48
DAY
POOR
42
NIGHT
POOR
6m
38
DAY
POOR
31
NIGHT
POOR
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes