It’s #SunDay#! Here’s your space weather report for the week of April 17 - 23: •6 M-class flares •0 C-class flares •34 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. Two X-class flares erupted right after the end of this reporting period — they’ll be first up in next week’s space weather report! Another thing we *don’t* see here: comet PANSTARRS (C/2025 R3)! The comet is currently passing between the Sun and Earth, and ESA/NASA’s SOHO spacecraft is watching the comet as it streaks across the view of its C3 coronagraph. We'll share more views of that comet later; in the meantime, check the latest imagery here: Learn more about space weather: