Briefly in March of 2016, a long coronal hole looked on Earth. These features emerge when the solar magnetic field reaches up and out into the cosmos. The effect — solar winds carrying solar material mix with Earth's magnetic field creating a geomagnetic storm. Results of this storm include satellite exposure to radiation (causing communications interference) as well as possible gorgeous auroral displays. [Learn more
(Image: © NASA/GSFC/Solar Dynamics Observatory)
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