A huge sun eruption combines with speedy solar wind from a "coronal hole" for a weekend aurora show, experts predict.

Auroras are possible over the U.S. tonight (March 25) as a "moderate" geomagnetic storm hits Earth. UPDATE: The Northern ...

A colossal coronal hole, nearly 500,000 miles (800,000 kilometers) wide, has opened in the sun's atmosphere, spewing fast-moving solar wind toward Earth. Coronal holes are regions where the sun's ...

Your browser does not support the video element. A giant, black region of the sun — called a coronal hole — was spotted on Monday by NASA's Solar Dynamics ...

NOAA Coronal holes form in the outermost layer of the sun when the local magnetic field opens up, allowing the solar wind to escape at a much faster rate than usual. Because of this escaping ...

The high-speed solar wind originating from this coronal hole, imaged here on Oct. 10, 2015, by NASA's Solar Dynamics Observatory, created a geomagnetic storm near Earth that resulted in several ...

UPDATE: The Northern Lights could be visible in the U.S. tonight (March 26), appearing as far south as New York and Idaho due to a "coronal hole" sending streams of charged particles toward Earth.

When you buy through links on our articles, Future and its syndication partners may earn a commission. The northern lights over Krasnoyarsk, Russia on Jan. 1. Two sun events have combined that ...