https://www.spaceweather.com/The article is on the December 26th Archive - located in the upper right. I put the text of the article below.
A SUNSPOT BIG ENOUGH TO SEE FROM MARS: Every day, NASA's Mars Perseverence rover looks at the sun to check the air for dust. It just saw a large sunspot:
Perseverance's images of the sun come from its MASTCAM (stereo mast camera), which puts about 90 pixels across the solar disk. It takes a large sunspot to show up in these low-resolution images. Today's sunspot is a behemoth, measuring at least 200,000 km from end to end.
Because Mars is orbiting over the farside of the sun, Perseverance can see approaching sunspots more than a week before we do. Consider this your 1-week warning: A really big sunspot is coming.
