THE MOST ACTIVE SUNSPOT IN YEARS: Fast-growing sunspot AR3663 has quickly become the most active sunspot of Solar Cycle 25. Today alone it has unleashed two X-flares and six M-class flares. This interest-compressed movie from the Solar Dynamics Observatory shows 12 hours of crackling action. Each of these flares has created a brief but deep radio blackout on Earth, causing loss of signal at frequencies below 30 MHz. These are events easily noticed by ham radio operators, aviators and mariners us

The Sun: Abundant Sunspot Activity | NASA’s Solar Dynamics Observatory FriendsofNASA.org: An abundance of sunspot groups are present on the visible solar disk—at least 12 active regions. Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun’s surface. Solar flares are a sudden explosion of energy caused by tangling, crossing, or reorganizing of magnetic field lines near sunspots. The southern solar hemisphere has the m

20K views · 230 reactions | Highly active sunspot AR3664 grew tremendously from May 6-9, 2024. See a time-lapse of the region here. As of May 9, it was about 15-Earths wide. Read more  https://trib.al/Pf7P2Vl Credit: Space.com | footage courtesy: NASA / SDO and the AIA, EVE, and HMI science teams / helioviewer.org| edited by Steve Spaleta | Space.com | Facebook

• Sunspot Light-Bridges • A Bridge from the Photosphere to the Corona? Light-bridges are lanes of bright material that divide the umbra in a sunspot. They are often observed during the break-up of sunspots and therefore can represent the re-establishment of convection which is normally inhibited by the sunspot's strong magnetic field. Their increased brightness suggests a higher plasma temperature than in the surrounding umbra, and they have been shown to display significantly enhanced chromosph