Sun to Earth Collision: Merged CMEs Expected to Trigger Moderate Geomagnetic Storm on October 11

Two coronal mass ejections (CMEs) are racing toward Earth, expected to merge and arrive on October 11. The National Oceanic and Atmospheric Administration (NOAA) has issued a G2 (moderate) geomagnetic storm watch, predicting minor impacts on power grids and satellitEs, as well as possible aurora visibility in northern and upper Midwest states.