After a calm week, the sun erupted again. A powerful M5.1 solar flare burst from an emerging sunspot region, shaking the ...

Activity on the sun is not constant; it varies along a cycle of about 11 years. The peak of this solar cycle — called solar maximum — is when sunspots, solar flares and coronal mass ejections (CMEs) ...

A coronal mass ejection (CME) from the Sun is expected to reach Earth on Thursday, Oct. 16, potentially triggering a G2 geomagnetic storm Just after sunset, auroras could be visible across parts of ...

While the Sun’s solar flares strongly correlate with sunspots, observations of more than 14,000 other stars show this is not generally the case.

Some states in the northern U.S. might have an opportunity to see the northern lights Tuesday, and recent solar activity may make the phenomenon visible in more states later this week, according to ...

Geomagnetic storms brought the northern lights to much of the U.S. on Tuesday night, painting the sky in vibrant hues of green and pink. "Well, we had activity tonight — a lot of geomagnetic storm ...

Strong geomagnetic storms brought colorful northern lights to the skies above many states on Tuesday night, including Missouri and Kansas. Forecasters are expecting more on Wednesday. Geomagnetic ...

Even with the glimmering harvest moon hogging the spotlight, solar storms could cast colorful auroras tonight and tomorrow Hasan Akbas /Anadolu via Getty Two powerful coronal mass ejections (CMEs) ...

Thanks to recent solar activity, parts of the northern states could be treated to a stellar light show as of Oct. 16 Patrick Pleul/picture alliance via Getty A coronal mass ejection (CME) from the Sun ...