July 25, 2011
The super-heated gas emits X-ray and ultraviolet radiation; Earth’s upper atmosphere absorbs it, which changes our atmosphere’s properties. This can disrupt communication, navigation, and surveillance systems, and also alter the orbits of satellites.
X-ray and ultraviolet radiation, energetic particles, and magnetized plasma clouds from a solar flare or a coronal mass ejection can cause electrical grid blackouts, disrupt navigation systems, and even disable spacecraft components. Solar Dynamics Observatory
CMEs directed toward Earth cause geomagnetic storms, which can wreak havoc on electrical power grids and produce widespread blackouts.
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