An fast, intense X1-class solar flare yesterday afternoon not only blasted a cloud of solar electrons and protons into space but also sent magnetic ripples across Earth's upper atmosphere.
Astro Bob blog: Strong solar flare creates rare magnetic ripples in Earth's atmosphere
An fast, intense X1-class solar flare yesterday afternoon not only blasted a cloud of solar electrons and protons into space but also sent magnetic ripples across Earth's upper atmosphere.

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