Solar Conditions & Ham Radio Propagation

HF Band Info

Band
Daytime Conditions

Nighttime Conditions
80m-40mFairGood
3.5 - 7.3 MHz
30m-20mFairFair
10.1 - 14.35 MHz
17m-15mPoorPoor
18.068 - 21.45 MHz
12m-10mPoorPoor
24.89 - 29.7 MHz

Solar Conditions

Sunspot Number
25

Derived from num of sunspots + groups. From 0 to 250, higher better
Solar Flux
80

Overall Solar Activity on 10.7cm. From 62.5 to 300, higher better
Geomagnetic Storm
Very Quiet

Overall activity of Earth's magnetic field. Based on K-Index.
Solar Wind
315.9

Speed of Solar Wind in KM/s. Typically 0-1000, lower better; Contributes noise
Noise Floor
S0-S1

Noise Contributed by Solar Activity.

Other Solar Conditions


A-Index
4

Average Geomagnetic Activity
Kp-Index
1

Geomagnetic Field Disturbance. From 0 to 10, lower better
X-Ray
A8.4

Intensity of X-Rays in Ionosphere. A, B, C, M, X Indicates Magnitude
304 Å Value
No Report

Total Solar Radiation at 30.4nm (Emitted by Ionized Helium)
Proton Flux
31

Density of Charged Protons in Solar Wind. Impacts E-Layer.
Electron Flux
1080

Density of Charged Electrons in Solar Wind. Impacts E-Layer.
F2 Crit. Frequency
7.60 MHz

Highest Frequency that reflects back from F2 Layer.
Maximum Usable Frequency
21.88 MHz

Maximum Usable Frequency for Sky-Wave Propagation.