CME Week 2014

Science Mission Directorate

Graphic representing the various Heliophysics disciplines; Sun, Earth, Space Weather, Near-Earth Space and the Magnetosphere. Understanding the Sun, Heliosphere, and Planetary Environments as a single connected system is a goal of the Heliophysics Research Program.
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NASA Solar Observatories

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CME Features

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What is a CME?

Two main types of explosions occur on the sun: solar flares and coronal mass ejections, or CMEs. Unlike the energy and x-rays produced in a solar flare – which can reach Earth at the speed of light in eight minutes – coronal mass ejections are giant, expanding clouds of solar material that take one to three days to reach Earth. Once at Earth, these ejections, also called CMEs, can impact satellites in space or interfere with radio communications. During CME WEEK from Sept. 22 to 26, 2014, we explore different aspects of these giant eruptions that surge out from the star we live with.

Past CME Imagery

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Coronal Mass Ejections

CME Week is Sept. 22-26, 2014Join NASA Sept 22-26 for CME Week. Follow and ask questions at #CMEWeek on Twitter.
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Past CME Videos

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Page Last Updated: September 22nd, 2014
Page Editor: Holly Zell