NOAA SOLAR DATA | 2026-04-18 01:00:02 UTC
QUIET
MUF 19.5 MHz | S/N S1-2
107
SOLAR FLUX INDEX
FAIR
4
A-INDEX
QUIET
2
K-INDEX
QUIET
B3.3
X-RAY
NOMINAL
202.9
ELECTRON FLUX
ACTIVE
16.5
PROTON FLUX
ELEVATED
PARTICLE RADIATION
19.5
MHz
MAX USABLE FREQ
HF OPEN
G0
GEOMAG STORM
NONE
R0
RADIO BLACKOUT
NONE
NOAA STORM SCALES
G2
GEOMAG FORECAST
MODERATE
R0
BLACKOUT FORECAST
NONE
24H FORECAST
HF BAND CONDITIONS
600m
81
DAY
GOOD
71
NIGHT
FAIR
160m
77
DAY
FAIR
68
NIGHT
FAIR
80m
75
DAY
FAIR
67
NIGHT
FAIR
40m
73
DAY
FAIR
65
NIGHT
FAIR
20m
68
DAY
FAIR
60
NIGHT
FAIR
10m
42
DAY
POOR
31
NIGHT
POOR
6m
40
DAY
POOR
30
NIGHT
POOR
7-DAY HISTORY
SOLAR INDICES
PARTICLE FLUX
Data source: NOAA Space Weather Prediction Center • Algorithm by RigReference • Classic view & widget embed codes