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| A number of NASA instruments captured detailed images of this coronal mass ejection on August 31, 2012. Although CMEs can damage sensitive technological systems, this one just struck a glancing blow to Earth's atmosphere. New research has identified quasi-annual variations in solar activity, which may help experts better forecast CMEs and potentially damaging space weathers. (Image courtesy NASA Goddard Space Flight Center.) |
The sun undergoes a type of seasonal variability with its activity, waxing and waning over the course of nearly two years, new research concludes. This behavior affects the peaks and valleys in the approximately 11-year solar cycle, sometimes amplifying and sometimes weakening the solar storms that can buffet Earth's atmosphere.Full Story
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