![How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com](https://www.spaceweatherlive.com/images/help/protonenstorm/EN_protonenstorm.jpg)
How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com
![How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com](https://www.spaceweatherlive.com/images/help/CME_full_halo.gif)
How do we know if a CME is Earth directed and when it's going to arrive? | Help | SpaceWeatherLive.com
![Coronal Mass Ejection Caught on NASA Video Dispersing Billions of Hypersonic Particles, Watch Now! | Science Times Coronal Mass Ejection Caught on NASA Video Dispersing Billions of Hypersonic Particles, Watch Now! | Science Times](https://1721181113.rsc.cdn77.org/data/images/full/34946/coronal-mass-ejection-cme-may-2013.jpg)
Coronal Mass Ejection Caught on NASA Video Dispersing Billions of Hypersonic Particles, Watch Now! | Science Times
![This illustration shows a coronal mass ejection (CME) blasting off the Sun's surface in the direction of Earth. Such storms can produce aurora and technological effects on Earth. - SpaceFlight Insider This illustration shows a coronal mass ejection (CME) blasting off the Sun's surface in the direction of Earth. Such storms can produce aurora and technological effects on Earth. - SpaceFlight Insider](https://www.spaceflightinsider.com/wp-content/uploads/2016/03/SWstorm_SDO_lines.jpg)