CORONAL MASS EJECTION Definition & Meaning

coronal mass ejection

noun

Astronomy.

a large-scale solar event involving an ejection of hot plasma that may accelerate charged particles and travel as far as the earth's orbit, preceded by a shock front that may create a magnetic storm on earth. : CME

coronal mass ejection

noun

a cloud of particles ejected from the sun's surface during a solar flare

coronal mass ejection

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A massive, bubble-shaped burst of plasma expanding outward from the Sun's corona, in which large amounts of superheated particles are emitted at nearly the speed of light. The emissions can cause disturbances in the solar wind that disrupt satellites and create powerful magnetic storms on Earth. They were first observed in the early 1970s, when photographs taken from satellites revealed coronal activity that could not be seen in images taken from Earth.

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Having the extra energy of an Earth-directed Coronal Mass Ejection and geomagnetic storm will increase chances even more.

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A stronger coronal mass ejection can cause auroras to show up in skies further away such as in London or France – as it did in May and October.

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But the impact is much more serious in space where the charged particles of a coronal mass ejection can make all the electronics on a satellite malfunction.

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They say a powerful coronal mass ejection tore through Earth’s orbit on 23 July but that we were “incredibly fortunate” that instead of hitting our planet, the storm cloud hit Nasa’s solar observatory STEREO-A in space.

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In 1989, a coronal mass ejection was knocked out part of Quebec's power grid for nine hours, leaving six million people without power.

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