coronal mass ejection


Definition of coronal mass ejection

: a tremendous outburst of energy from the corona of the sun that can cause disruptions in the earth's geomagnetic field As they had for the January eruption, the researchers relied on an armada of spacecraft to track the disturbance, known as a coronal mass ejection because it originates in the sun's outer atmosphere, or corona.— R. Cowen abbreviation CME — compare solar flare

Examples of coronal mass ejection in a Sentence

Recent Examples on the Web According to the prediction center, a coronal mass ejection erupted Monday and models suggest a portion of it will arrive late Wednesday into early Thursday. Miriam Marini, Detroit Free Press, 29 Mar. 2022 On Saturday evening, a solar flare released a coronal mass ejection from a sunspot called AR2936, which had been rapidly increasing in size in a two-day span, according to Jordan Mendoza, USA TODAY, 3 Feb. 2022 However, in this instance, the coronal mass ejection was traveling away from us. Katie Hunt, CNN, 21 Feb. 2022 Enlarge / Illustration of a coronal mass ejection impacting the Earth's atmosphere. Jon Brodkin, Ars Technica, 9 Feb. 2022 Geomagnetic storms form when a gust of plasma-rich solar wind, also called a coronal mass ejection, sweeps through Earth's magnetic field. Jennifer Leman, Popular Mechanics, 9 Feb. 2022 Eruptions like solar flares and coronal mass ejection events — when the sun's outermost atmosphere spits out plasma and magnetic fields — can impact the power grid, satellites, GPS, airlines, rockets and astronauts in space. Jackie Wattles, CNN, 9 Feb. 2022 Imagery later confirmed that the eruption was accompanied by a major coronal mass ejection that could collide with Earth’s magnetic field in the coming days. Eric Mack, Forbes, 28 Oct. 2021 The agency's Space Weather Prediction Center said the coronal mass ejection is expected to reach the Earth on Saturday, and effects are likely to continue into Sunday. NBC News, 30 Oct. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coronal mass ejection.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of coronal mass ejection

1974, in the meaning defined above

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The first known use of coronal mass ejection was in 1974

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Last Updated

16 Apr 2022

Cite this Entry

“Coronal mass ejection.” Dictionary, Merriam-Webster, Accessed 19 May. 2022.

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