Solar Conditions & Ham Radio Propagation

HF Band Info

Band
Daytime Conditions
Nighttime Conditions
80m-40mPoorGood
3.5 - 7.3 MHz
30m-20mFairGood
10.1 - 14.35 MHz
17m-15mGoodGood
18.068 - 21.45 MHz
12m-10mGoodPoor
24.89 - 29.7 MHz

Solar Conditions

Sunspot Number
134

Derived from num of sunspots + groups. From 0 to 250, higher better
Solar Flux
154

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

Overall activity of Earth's magnetic field. Based on K-Index.
Solar Wind
352.8

Speed of Solar Wind in KM/s. Typically 0-1000, lower better; Contributes noise
Noise Floor
S1-S2

Noise Contributed by Solar Activity.

Other Solar Conditions


A-Index
8

Average Geomagnetic Activity
Kp-Index
2

Geomagnetic Field Disturbance. From 0 to 10, lower better
X-Ray
C1.3

Intensity of X-Rays in Ionosphere. A, B, C, M, X Indicates Magnitude
304 Å Value
157.0

Total Solar Radiation at 30.4nm (Emitted by Ionized Helium)
Proton Flux
9

Density of Charged Protons in Solar Wind. Impacts E-Layer.
Electron Flux
1350

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

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

Maximum Usable Frequency for Sky-Wave Propagation.