At around 10 p.m. UTC (6 p.m. ET) on September 26.
The U.S. National Oceanic and Atmospheric Administration's (NOAA) Space Weather Prediction Center (SWPC) .
Released a space weather alert stating that a geomagnetic K-index of 4 was expected.
Essentially an indication that Earth's magnetic field was being very mildly affected by some solar activity.
According to the SWPC, this is indicative of a strong geomagnetic storm that could set off alarms on power system protection devices.
Increase satellite drag and orientation problems, disrupt GPS navigation intermittently, and cause auroras in the United States.