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Years ago, when solar physicists first witnessed a towering wave of hot plasma racing along the sun's surface, they doubted their senses. The scale of the thing was staggering
It rose up higher than Earth itself and rippled out from a central point in a circular pattern millions of kilometers in circumference
Skeptical observers suggested it might be a shadow of some kind—a trick of the eye—but surely not a real wave
"Now we know," says Joe Gurman of the Solar Physics Lab at the Goddard Space Flight Center. "Solar tsunamis are real."
A solar tsunami seen by the STEREO spacecraft from orthogonal points of view. The gray part of the animation has been contrast-enhanced by subtracting successive pairs of images, resulting in a "difference movie
"waves of hot plasma and magnetism"
Originally posted by Phage
reply to post by havok
Because they are confined to the surface of the Sun (unlike solar flares and CMEs), they can't really affect us.
But it does say "no direct threat". There could be secondary effects that we don't know about that could affect us but since the waves have been happening undetected forever there isn't much reason to think so.