Drop in x-ray radiation

Since October 21, the x-ray radiation dropped below the A-level. After the turbulent presence of the big sunspot 37/0808 during September, the Sun is taking a break. The 'All-quiet-alert' that was broadcast since Wednesday is still valid.



The earth-orbiting satellites GOES10/12 measure the x-ray radiation coming from the Sun. This radiation is plotted above as function of time for two periods: September 9-11 and October 26-28. There is a dramatic difference between the plots. In September, it seemed that the Sun lost its track to minimum when it fired several X-class flares and CMEs hurled into space. Today, hardly any A-flare is seen. For sure, it makes our task as a forecaster much easier and more relaxed.



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