"MUSICAL" WAVES DETECTED IN EARTH'S MAGNETIC FIELD: This week in Norway, a space weather observatory detected sine waves of exceptional purity rippling through Earth's polar magnetic field. The waves, which persisted for hours with nearly perfect pitch, have been linked to "tearing instabilities" and explosions in Earth's magnetic tail--not to mention bright auroras in Arctic skies. Visit today's edition of Spaceweather.com to see the waves and to learn more about them.
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