Solar flares and other activity can disrupt radio communications, power grids and navigation signals, according to NASA.

A powerful X1.9 solar flare from new sunspot AR4299 triggered strong radio blackouts, as giant sunspot AR4294 rotates into ...

A sunspot, potentially generating multiple solar flares, may lead to auroras that could be visible as far south as Alabama.

A high-powered solar flare erupted from the sun last week, causing a major radio blackout in Europe and Asia. The eruption happened at 3:25 a.m., meaning that the sun wasn't in the Texas sky at the ...

A high-magnitude solar flare erupted from a new sunspot on the sun’s surface, which caused a disruption of radio signals across Earth’s Eastern Hemisphere on Tuesday. Classified as an X2.7 solar flare ...

Waves of solar flares keep pouring out of the sun, sparking "rolling" radio blackouts across the world. Active sunspot regions on the sun's surface are responsible for the flares, which are classified ...

The sun has a bone to pick with Earth — and it’s not done yet. A colossal solar storm just zapped the daylight side of the planet, causing global blackouts and knocking out radio signals across Europe ...

Solar flares, the sudden bursts of radiation that erupt from the Sun’s atmosphere, have become a topic of intense scrutiny for scientists. The potential of these flares to disrupt power grids and ...

The sun has emitted a powerful solar flare that has the capability to interfere with technology on Earth. The explosive burst of radiation peaked on the evening of June 17, matching the intensity of ...

The sun unleashed another strong X-class solar flare overnight, stronger than the one that occurred on Tuesday — an X2.7, the strongest so far this year. X-class flares are the strongest and most ...

Over the last 36 hours, the sun has released two more X-class solar flares, providing for more chances of the northern lights this week. On both Sunday morning and Monday morning, the sun released an ...

The sun is not a static, tranquil sphere of gas, but an active, turbulent star with magnetic fields that twist and snap in powerful eruptions. Among the most striking and energetic of these eruptions ...