Coronal mass ejections

CME overview

The Sun sometimes throws off a billion-ton cloud of plasma. If one is aimed at Earth, it can shake the magnetosphere a day or two later — the same storms that push the aurora farther south. This page follows the latest events from SIDC and NASA.

On the way to Earth

NASA’s WSA-ENLIL model tracks each cloud as it expands through the solar system. Play the timeline to watch storms cross the Sun–Earth line. The map on the right is NASA’s official density animation.

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