Bridge of Sighs
An aurora borealis appears to touch down on an illuminated bridge in Sommarya in northern Norway
In addition to the September 11 coronal mass ejection (CME)-a giant bubble of charged solar particles-multiple bursts of solar magnetic activity shot CMEs toward Earth in the first few days of September.
The Solar Dynamics Observatory caught sight of the initial explosive flare emanating from a giant group of sunspots. The flare sent a CME racing toward Earth at 250 miles (400 kilometers) per second. When the particles smacked Earth's magnetic field on the eighth, auroral sparks flew.
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