A SECOND CME IS APPROACHING: Minor G1-class geomagnetic storms are likely on July 21st (1600 UT) when a CME is expected to hit Earth’s magnetic field. This would be the second day in a row a CME has struck. Yesterday’s impact was weak and did not spark a geomagnetic storm, but it might have softened up our magnetosphere for a more effective strike today.
https://spaceweather.com/
Ydun Ritz (2023-07-21)