Solar flares, depending on the X-ray power, are divided into five classes: A, B, C, M and X. The minimum class A0.0 corresponds to the radiation power in the Earth orbit of 10 nanowatts per square ...

Sunspot AR3767 erupted with a X1.7-class solar flare, followed by an X1.1-class flare from sunspot AR3780. NASA's Solar ...

Sunspot AR3256 erupted with an X1.2-class solar flare. NASA's Solar Dynamics Observatory captured the fireworks in multiple wavelengths. Credit: Space.com | footage courtesy: NASA/SDO | edited by Stev ...

Normally only visible much closer to the north pole, the Northern Lights have been seen as far south as New Mexico in recent ...

NOAA’s Space Weather Prediction Center has issued a geomagnetic storm watch for October 16 as several coronal mass ejections ...

A strong solar flare-up could bring auroras to the far north, and might even be visible in some U.S. states on Thursday.

In the western half of the country, northern Manitoba, central Saskatchewan, and southeastern Alberta appear to have the best ...

Scientists at the University of Hawaiʻi have discovered why it rains on the Sun. Solar rain, made of cooling plasma, forms ...

The Northern Lights may be visible in the U.S. this week, following a geomagnetic storm forecast by space weather experts at ...

Four coronal mass ejections launched from the Sun in recent days are expected to reach Earth soon, with experts predicting they could produce vivid aurora displays across much of the Northern ...

Scientists say a train of CMEs could impact Earth's magnetic field Oct. 15–17, bringing a chance of northern lights across ...

A New Mexico State University astronomer and her team can now predict space weather in the sweet spot between two extremes of ...