Solar-Terrestrial Data

Last Update

Data last updated: 2026-02-17 06:00:52

Next update in: 30:00 minutes

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Parameter	Value
Last Updated Last update time	17 Feb 2026 0600 GMT
Solar Flux Overall Solar Activity on 10.7cm. From 62.5 to 300, higher better	118
Sunspot Number Derived from num of sunspots + groups. From 0 to 250, higher better	69
A-Index Average Geomagnetic Activity	29
K-Index Geomagnetic Field Disturbance. From 0 to 10, lower better	3
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	B8.8
Geomagnetic Field Overall activity of Earth's magnetic field. Based on K-Index	UNSETTLD
Signal Noise Noise Contributed by Solar Activity	S2-S3
MUF Maximum Usable Frequency for Sky-Wave Propagation	NoRpt
Solar Wind Speed of Solar Wind in KM/s. Typically 0-1000, lower better	612.0
Proton Flux Density of Charged Protons in Solar Wind. Impacts E-Layer	8
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	Poor	Fair	17:00 - 05:00 (Night) Detecting location...	Popular bands for local and regional communication
30m-20m	Good	Good	07:00 - 13:00 (Day Peak) \| 04:00-06:00 & 15:00-17:00 (Gray Line) Detecting location...	Excellent for long-distance communication during daylight
17m-15m	Fair	Fair	08:00 - 11:00 (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