The powerful flare from sunspot region AR4341 peaked at 1:09 p.m. EST (1809 GMT), according to NOAA's Space Weather ...

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

Colorful auroras could dazzle skywatchers again on Monday night amid a severe geomagnetic storm and what the National Oceanic ...

One way to track the solar cycle is by counting the number of sunspots, which are dark, cooler patches on the Sun’s surface.

An X-class solar flare has produced an Earth-directed coronal mass ejection, increasing solar activity and raising the likelihood of geomagnetic impacts within 24 hours.

NASA scientists are warning that the sun may be "waking up" from a brief period of relative inactivity, contradicting past assumptions about our home star. If true, this could mean that decades of ...

When the ground shakes violently, entire cities can crumble within minutes. Homes, hospitals, roads, and lives can vanish suddenly. Despite advances in technology, predicting when earthquakes will ...

For two nights, dazzling auroras delighted sky-gazers in unexpected places, including in the US as far south as Florida. The cause: dual solar storms unleashed by the sun reaching Earth. A severe ...

Cosmogenic radionuclides, such as 14C and 10Be, are produced in Earth’s atmosphere by interactions with cosmic rays and offer a unique window into past solar variability. Their deposition in natural ...

From the 1980s thru 2008, scientists observed that nuclear activity inside the Sun was continuously trending downward, and it was expected that this would continue. However, a new study by the ...