A sun storm erupted on Monday (Sept. 30), sending a huge cloud of charged particles streaking into space. That cloud -- known as a coronal mass ejection, or CME -- hit Earth's magnetic field at around 10 p.m. EDT on Tuesday, researchers said.
A sun storm erupted on Monday (Sept. 30), sending a huge cloud of charged particles streaking into space. That cloud -- known as a coronal mass ejection, or CME -- hit Earth's magnetic field at around 10 p.m. EDT on Tuesday, researchers said.