What Makes a "cannibal coronal mass ejection (CME)".

An M3-class solar flare that lasted about 3 hours created a massive coronal mass ejection. The Solar Dynamics Observatory (SDO) and the Solar and Heliospheric Observatory (SOHO) captured the fireworks ...

Nearly a dozen states in the northern U.S. may have an opportunity to see the northern lights Sunday as geomagnetic storms ...