Northern lights occur when a solar flare interacts with Earth's atmosphere.

"This is the largest solar radiation storm in over 20 years," the Space Weather Prediction Center said on Monday.

Fired from a vast sunspot, the "coronal mass ejection" is expected to reach Earth on either Thursday or Friday this week.

Earth just experienced a rare S4 solar radiation storm, the most intense since 2003 — powerful for satellites and astronauts, ...

The planet is experiencing the most powerful solar event since 2003—and it's bringing spectacular Northern Lights.

A powerful flare has unleashed a severe solar storm that could cause auroras and satellite disruptions on Earth.

Earth's magnetic field was struck by a "severe" solar storm Monday (Jan. 19), triggering vibrant auroras in the U.S. and ...

A solar radiation storm stronger than one we've seen in over two decades is in progress, the Space Weather Prediction Center announced Monday.

Largest solar radiation storm in more than 20 years could trigger auroras on Earth - A solar radiation storm this large has ...

(KRON) — A “severe” geomagnetic storm watch has been issued for Monday and Tuesday as the largest solar radiation storm in more than 20 years hits Earth, according to the National Oceanic and ...

Tree rings hold clues about ancient solar storms. New research shows tree growth and carbon storage can shift those signals across years.

After Storm Fern cut power to millions, GoodPower CEO Leah Qusba explains what really failed on the grid, and why wind and solar weren’t to blame.