Sunspots AR3664 and AR3663 have been erupting with X- and M-class solar flares. Both sunspots are Earth-facing and could ...

Sunspot AR4618 erupted with an M4.4-class solar flare causing a coronal mass ejection (CME) that may give Earth a glancing blow. NASA's Solar Dynamics Observatory captured the fireworks in multiple ...

Images captured by NASA's Solar Dynamics Observatory have revealed that "coronal loops" give off subtle flashes of ultraviolet light before a solar flare, which could act as an early warning system ...

A solar eclipse on April 27, 2025, as seen only by NASA Solar Dynamics Observatory. When is the next solar eclipse? Yesterday and today — but they were not reported in advance. Why? They were only in ...

When sunspots erupt at nearly the same time, it could be something known as "sympathetic solar flares." A double eruption from sunspots AR3614 and AR3615 may be an example of it. One of the flares was ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. These processes follow the solar cycle, an 11-year cycle of increasing and decreasing activity on ...