.NOAA satellites caught the sun's CoronalMassEjection last week. The CME kicked off a large geomagnetic storm here on Earth and brought the aurora borealis as far south as Arizona. Learn more about the event in this week's EarthFromOrbit video:
at nearly two million miles per hour and generated a severe geomagnetic storm at 3:26 p.m. EDT on April 23.
They can affect power grids on Earth as well as radio signals and communications systems., particularly if they are doing a spacewalk. Outside of the Earth's protective atmosphere, the extra radiation they are exposed to may cause radiation poisoning or other harmful health effects.
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