It’s #SunDay! Here’s your space weather report for the week of Feb. 20 - 26: •1 M-class flare •2 C-class flares •27 coronal mass ejections •0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. A pretty quiet week, partly due to the absence of sunspots on the Sun.👇

Active regions and sunspots often go together, but not always. Sunspots form on the solar surface, and we see them in visible light. Active regions (like those in the video above) show up in extreme ultraviolet light and form in the Sun’s upper atmosphere. Here’s two different views captured by SDO just a few seconds apart. At left is the Sun’s surface in visible light. At right, the Sun’s upper atmosphere in extreme ultraviolet light. Hard to tell that that’s the same Sun!