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Below are time-elongation plots built up from SECCHI running difference images, known colloquially by some as "J-plots". Coronal mass ejections (CMEs) are seen as diagonal bright and dark bands running from lower-left to upper-right. The steepness of the band reflects the speed of the CME. So an angle of 80 degrees would give us a CME speed of nearly 800km/sec; an angle of 50 degrees gives us a CME speed arround 300km/sec. Occasionally one can also see planets or bright stars as streaks in the plots.
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15:42
May
22
2013
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Moderate S2 Space radiation storm - This happens around 25 times in a solar cycle |
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05:42
May
20
2013
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Moderately strong M1.77 solar flare |
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22:36
May
19
2013
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Weak CME impact Currently we see the effects of the arrival of a Coronal Mass Ejection (CME) at the ACE satellite. The solar wind speed rose with 79.26 km/sec to 455.5 km/sec.
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