One of the largest sunspot formations of the past several years is currently visible on the sun. The group, catalogued as AR 4294-4298, is so large that several of the dark regions exceed the Earth’s diameter. According to Newsweek, these are the largest sunspots in a decade.
With binoculars or a telescope and an appropriate solar filter, the spots on the western side of the sun can be clearly identified. NASA’s solar probe Solar Dynamics Observatory (SDO) recently documented a solar flare in this region.
Possible effects on Earth
The sunspots are currently pointing towards Earth. The Space Weather Prediction Center (SWPC) of the US National Oceanic and Atmospheric Administration (NOAA) reports that coronal mass ejections (CME) from the active regions have not yet hit Earth. Nevertheless, experts predict that they could turn to more favorable positions over the next week, such that activities like solar flares could also be felt on Earth.
For those of us on Earth, this could mean a special visual spectacle: auroras are possible when the plasma hurled into space by the sun hits the Earth’s magnetic field. The sunspot AR 4274 already caused spectacular northern lights some time ago. After rotating around the sun’s axis, the sunspot is now back under the new designation AR 4294-4298 and it’s significantly larger than before.
Historical comparison and risks
SpaceWeather.com draws a comparison with the sunspot region of 1859, which triggered the so-called “Carrington Event,” which was the strongest documented solar storm to date. The current formation is around 90 percent the size of that historical one.
Although the exact impact on Earth and technology is still unclear, strong solar storms can jeopardize satellites, including systems like Starlink as well as GPS-based navigation systems. According to some studies, underwater internet repeaters could be particularly vulnerable, leading to regional or even global outages. Land-based fiber optic connections are less affected, so the US is somewhat less at risk.
Experts are monitoring the sunspot activity closely so that they can react in good time in the event of an emergency.
via PCWorld https://www.pcworld.com
December 3, 2025 at 10:46AM