Summary
A severe geomagnetic storm, rated G4 by the National Oceanic and Atmospheric Administration (NOAA), hit parts of the United States on November 11. This event led to auroras visible in areas as far south as Florida and could disrupt power grids and satellite systems.
Key Facts
- The geomagnetic storm peaked at 8:20 p.m. ET on November 11.
- NOAA issued a G4 alert, the second-highest level on their five-level scale.
- This is the fourth G4 alert since the solar cycle began in 2019.
- The storm was caused by charged particles from the sun hitting Earth, linked to a solar flare and coronal mass ejections (CMEs).
- Auroras were visible as far south as northeastern Colorado, with forecasts for Alabama and northern California.
- The storm could disrupt GPS, radio signals, power grids, and other technologies.
- It is expected to weaken by November 13 but could reach G5 levels, the highest on the scale.
