Propagation & spaceweather
Solar cycle 25
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Two strong M-class solar flares
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Coronal hole faces Earth
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Sunspot region 3088 departs, is 3089 about to take over?
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S1 storm, CME arrival, M-flares
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M5.7 solar flare from sunspot region 3004
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X1.1 solar flare on the south-east limb
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M9.6 solar flare
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M7.3 and X2.2 solar flares
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X1.1 solar flare
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A large sunspot region is about to rotate onto the earth-facing disk
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Solar Cycle 25: The Overachiever
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Minor G1 geomagnetic storm watch for 6 April
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M3.9 solar flare, S1 radiation storm
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CME arrival, X1 halo CME
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X1.3 solar flare
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Two coronal mass ejections, G3 storm watch
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M4.0 solar flare from sunspot region 2975
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M1.4 solar flare with earth-directed CME
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C3.1 solar flare, Earth-directed CME
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Geomagnetic storm blamed for the loss of 40 Starlink satellites
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M1 solar flare, G2 storm watch
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G1 storm watch, M-class solar flare
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M1.3 solar flare
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M1.2 solar flare
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Sunspot region 2894
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G3 geomagnetic storm
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G3 geomagnetic storm
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G2 geomagnetic storm watch
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G2 geomagnetic storm watch
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M1.7 solar flare with earth-directed CME
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M1.7 solar flare with earth-directed CME
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M1.5 solar flare with CME, glancing blow possible?
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M1.5 solar flare with CME, glancing blow possible?
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X1 coronal mass ejection has arrived!
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X1 coronal mass ejection has arrived!
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CME impact expected, G3 storm watch
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CME impact expected, G3 storm watch
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X1 solar flare with a major CME
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X1 solar flare with a major CME
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M-class solar flares from a new sunspot region
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M-class solar flares from a new sunspot region
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M1.6 solar flare, G2 storm watch
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M1.6 solar flare, G2 storm watch
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C1 solar flare, earth-directed CME
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C1 solar flare, earth-directed CME
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Coronal hole faces Earth
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M4.7 solar flare, G1 storm
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C3.0 solar flare with earth-directed CME
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Coronal hole faces Earth
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First X-class solar flare of Solar Cycle 25
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M flares, G2 geomagnetic storm watch
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C3 solar flare with earth-directed CME
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M1.1 solar flare
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Geomagnetic storming, coronal hole
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Filament eruption, G1 storm watch
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Coronal hole faces Earth
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Coronal hole faces Earth
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Coronal hole stream arrival, new alerts bars
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Coronal hole stream arrival, new alert bars
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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.
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