Propagation & spaceweather
Solar cycle 25
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Coronal hole faces Earth, Sunspot region 2797
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Solar wind shock wave arrived at Earth
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C4.0 solar flare
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Coronal mass ejection arrival
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Earth-directed coronal mass ejection
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C7.4 solar flare
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C1 solar flare and CME, glancing blow possible
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M4.44 solar flare
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SpaceWeatherLive store launched!
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Sunspot region 2785 and 2786
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Long duration C2.6 solar flare
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Solar activity on the rise
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Coronal hole faces Earth
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Coronal hole faces Earth
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Solar Cycle 25 has officially started in December 2019
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Solar Cycle 25 has officially started in December 2019
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Coronal hole faces Earth
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Coronal hole faces Earth
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C2 solar flare, SC25 slowly ramping up?
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C2 solar flare, SC25 slowly ramping up?
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Have we passed solar minimum?
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Have we passed solar minimum?
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Yesterday's M-flare producing active region rotates into view
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Yesterday's M-flare producing active region rotates into view
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First M-class solar flare of a Solar Cycle 25 region!
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First M-class solar flare of a Solar Cycle 25 region!
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Time flies... Roll on Solar Cycle 25...?
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Time flies... Roll on Solar Cycle 25...?
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G1 geomagnetic storm, Coronal hole faces Earth
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April... The month of solar minimum?
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Welcome back DSCOVR!
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Coronal hole faces Earth
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Solar Orbiter successfully launched into space
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Coronal hole, Transit to Solar Cycle 25
Where the above map indicates the foF2 NVIS Critical Frequency, the relationship between the foF2 frequency and the Maximum Usable Frequency (MUF) is approximately 1:3. Multiplying the foF2 critical frequency by 3 approximates the MUF. The following color chart is adjusted to indicate the MUF.
