During a coronal mass ejection, the sun expels billions of tons of material, some of which travels toward our planet. The Earth’s magnetic field deflects most of the sun’s particles, but some enter at the poles, where interactions with our atmosphere create the aurora borealis.
An illustration that shows how northern lights are created. The sun, during coronal mass ejections, emits particles that are carried outward by solar wind. Most of those particles are deflected by the Earth’s magnetic field. Some make it through the field and get trapped; those particles find escape where the magnetic field is weakest at the North Pole and South Pole. When the escaped particles collide with the upper atmosphere, auroral lights are created.
AURORAL
OVAL
CORONAL MASS EJECTION
SOLAR WIND
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CORONAL MASS
EJECTION
AURORAL
OVAL
SOLAR WIND
AURORAL
OVAL
CORONAL MASS EJECTION
SOLAR WIND
AURORAL
OVAL
CORONAL MASS EJECTION
SOLAR WIND