Solar Orbiter has captured the clearest evidence yet that a solar flare grows through a cascading “magnetic avalanche.” Small, weak magnetic disturbances rapidly multiplied, triggering stronger and stronger explosions that accelerated particles to extreme speeds.

The massive sunspot that sparked an "extreme" geomagnetic storm in May 2024 unleashed hundreds of other dangerous solar flares, including a hidden X-class outburst, a new paper reveals. The study sets a record for the longest continuous observation of a single active region on our home star.

(CNN) — For the first time, astronomers say they have spotted a giant explosion released by a star beyond our solar system. The eruption was similar in some ways to those unleashed by our sun, such as the solar storms that graced the night skies with ...

At least one space launch has been put on hold, as satellite operators and rocket companies manage the effects of the current geomagnetic storm hitting Earth. A coronal mass ejection — giant solar explosion sending streams of charged particles into space ...

Dial Hong, a meteorologist with the National Weather Service's Bay Area office, told SFGATE that the Space Weather Prediction Center said that aurora sightings were concentrated in rural and less populated areas of the North Bay and Northern California,