NOAA SOLAR DATA | 2026-03-27 18:05:00 UTC
QUIET
MUF 28.8 MHz | S/N S1-2
152
SOLAR FLUX INDEX
GOOD
10
A-INDEX
QUIET
2
K-INDEX
QUIET
B9.9
X-RAY
NOMINAL
1,464.6
ELECTRON FLUX
ALERT
40.4
PROTON FLUX
ELEVATED
PARTICLE RADIATION
28.8
MHz
MAX USABLE FREQ
ALL BANDS
HF BAND CONDITIONS
600m
100
DAY
GOOD
91
NIGHT
GOOD
160m
97
DAY
GOOD
88
NIGHT
GOOD
80m
95
DAY
GOOD
86
NIGHT
GOOD
40m
92
DAY
GOOD
84
NIGHT
GOOD
20m
90
DAY
GOOD
82
NIGHT
GOOD
10m
77
DAY
FAIR
69
NIGHT
FAIR
6m
54
DAY
FAIR
43
NIGHT
POOR
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes