The sun is now moving toward a minimum in the 11-year solar cycle, and spots on the sun’s surface have been few and far between. But, in recent days, a giant spot has come into view on the sun. Dubbed Active Region 2529, it is many times the size of Earth. EarthSky community members have captured images of AR2529, and it has now turned in Earth’s direction.
The spot hasn’t been extremely active, although it has produced a few small flares and an accompanying minor coronal mass ejection (CME). But, according to spaceweather.com, high-latitude observers should be on the lookout for auroras, anyway. That’s because of an incoming solar wind stream pouring from a hole in the sun’s atmosphere. This coronal hole has prompted space weather forecasters at NOAA to give us:
… a 75% chance of G1-class geomagnetic storms on April 13 when a solar wind stream is expected to hit Earth’s magnetic field.
A minor CME from sunspot AR2529 could deliver a glancing blow at about the same time, further boosting the odds of storminess.
High-latitude sky watchers should be alert for auroras.
The video below is from MyNikonP900Zoomz on YouTube. And, although, it may be true that AR2529 is visible to the unaided eye at sunset, it’s really not wise to give that a try! Even at sunset, looking at the sun with your unaided eye can result in permanent eye damage. Nice video, though!
Bottom line: On a relatively quiet sun, a large sunspot seems particularly noticeable! Giant sunspot AR2529 is now facing Earth’s way and should be visible for another week or so.
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.