An eruption of a massive solar prominence—spanning roughly half a million kilometers—was captured today by several space-based telescopes. By nature, solar prominences are cool, dense clouds of gas hovering above the Sun’s surface, often at altitudes reaching tens of thousands of kilometers. Unlike clouds on Earth, which drift freely with the wind, solar prominences are entangled in magnetic field lines that anchor them in place, while simultaneously allowing them to grow and expand. At times, they develop into truly colossal structures, measuring hundreds of thousands — or even up to a million — kilometers across.
Essentially, prominences are foreign structures within the Sun’s corona, and the star consistently seeks to shed them — most often by ejecting them into space. The eruption of a giant prominence is one of the most spectacular sights among the various manifestations of solar activity.
Prominences are also a source of some of the most intense geomagnetic storms. When a dense, heavy filament of gas strikes a planet’s magnetic field, it typically triggers storms ranging from G3 to G4 (classified as "strong" to "very strong"). The most extreme events — those reaching the G5 level—are generally triggered by exceptionally powerful solar flares.
In this instance, the prominence appears to be traveling laterally rather than directly toward Earth. Among the nearby planets, only Mars seems to lie in its path. Nevertheless, it is still possible that the edge of this gas cloud could graze Earth, though any resulting impact would likely be minor. Further calculations will be released tomorrow morning; in the meantime, one can simply take another look at this magnificent spectacle. The video was captured by the SUVI telescope on the GOES-R satellite between approximately 08:30 and 17:00 Moscow time today, October 29, 2026.