Solar weather and EMPs both pose great threats to the United States' power grid and need to be addressed as soon as possible.

An active sunspot could give photographers another reason to photograph the night skies this weekend. A solar flare that hit ...

The activity of the sunspot was linked to a coronal mass ejection (CME), a rapid release of plasma that is coming to Earth in the next few days. Northern and southern lights are produced when these ...

The M4.4 solar flare unleashed a coronal mass ejection (CME) into space — and Earth might just receive a glancing blow.

After a 22-day lull, sunspot AR 4168 unleashed three M-class flares on Aug. 3–4. They may cause brief radio blackouts and auroras from glancing CMEs.

After weeks of relative quiet, the Sun has erupted with a series of powerful solar flares, signaling a return to more active ...

After more than three weeks without a powerful solar flare, the sun has suddenly ramped up its activity, firing off three ...