Last year’s solar eclipse set off a wave in the upper atmosphere

The moon’s shadow launched a ripple that was seen from Brazil an hour later

animation of eclipse shadow over north america

IN THE SHADOW  The solar eclipse on August 21, 2017, was seen from space by the DSCOVR satellite. The moon’s shadow spurred an atmospheric wave that propagated around the world for hours after the eclipse was over.

EPIC Team/NASA

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