This stunning light show was triggered by a G4 geomagnetic storm caused by a plume of solar plasma ejected from the sun.

Scientists at NASA and NOAA think the sun has reached the maximum phase of the solar cycle, which means another year — at least — of intense Northern Lights.

Geomagnetic storms are measured on a scale of G1 to G5, with G5 being the most powerful and least commonly seen. At its solar ...

However, this will not be a “severe” event, as on Oct. 10/11 and May 10’s extreme G5 geomagnetic storm, when the northern lights were viewed across the U.S. as far south as Arizona and Florida.

Geomagnetic storms are measured on a scale of G1 (minor) to G5 (extreme), with G5 storms being the least common but most ...

Extreme events (G5 on the NOAA scale) are much less common. On average, there are 4 occurrences of G5 geomagnetic storms per solar cycle, which is about 0.1 percent of the time. Even among these ...

The even better news is that the active regions in question are the same ones that produced the intense G5 geomagnetic storm on Oct. 10-11. The fallout from the Oct. 24 solar flare could strike ...

Displays of Northern lights are possible on Sunday night across the Northern U.S. due to a geomagnetic storm underway.