A geomagnetic storm will expand visibility of the aurora borealis Thursday and Friday nights. See maps of which states will get to see the northern lights.

A coronal mass ejection hurtling from the sun toward Earth could trigger a geomagnetic storm, making the northern lights visible in up to 18 US states ...

A coronal mass ejection hurtling from the sun toward Earth could unleash the northern lights in up to 18 states in the US.