Solar-Terrestrial Data

Last Update

Data last updated: 2026-04-22 08:23:06

Next update in: 30:00 minutes

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Parameter	Value
Last Updated Last update time	22 Apr 2026 0822 GMT
Solar Flux Overall Solar Activity on 10.7cm. From 62.5 to 300, higher better	112
Sunspot Number Derived from num of sunspots + groups. From 0 to 250, higher better	68
A-Index Average Geomagnetic Activity	19
K-Index Geomagnetic Field Disturbance. From 0 to 10, lower better	1
Aurora Latitude Estimated equatorward auroral oval latitude (both hemispheres)	67.5 °
X-Ray Intensity of X-Rays in Ionosphere. A, B, C, M, X Indicates Magnitude	B6.4
Geomagnetic Field Overall activity of Earth's magnetic field. Based on K-Index	VR QUIET
Signal Noise Noise Contributed by Solar Activity	S0-S1
MUF Maximum Usable Frequency for Sky-Wave Propagation	NoRpt
Solar Wind Speed of Solar Wind in KM/s. Typically 0-1000, lower better	487.6
Proton Flux Density of Charged Protons in Solar Wind. Impacts E-Layer	11
Electron Flux Density of Charged Electrons in Solar Wind. Impacts E-Layer	N/A
F2 Critical Frequency Highest Frequency that reflects back from F2 Layer	N/A

Band	Day	Night	Ideal Hours (UTC)	Notes
80m-40m	Fair	Good	19:00 - 02:00 (Night Peak) \| 02:00 - 04:00 (Gray Line) Detecting location...	Popular bands for local and regional communication
30m-20m	Good	Good	05:00 - 11:00 (Day Peak) \| 02:00-04:00 & 16:00-18:00 (Gray Line) Detecting location...	Excellent for long-distance communication during daylight
17m-15m	Fair	Fair	06:00 - 09:00 (Day - Limited) Detecting location...	Good for worldwide communication during daylight
12m-10m	Poor	Poor	No ideal hours (SFI >120 required for reliable openings) Detecting location...	Best during high solar activity, excellent for worldwide communication