The forecast of solar and geomagnetic activity for December 11-13, 2023 was published by the Space Weather Prediction Center of the US National Oceanic and Atmospheric Administration.
Geomagnetic storms are classified according to their power level — the K-index — from 2 to 9. The higher the K-index, the stronger the storm and its effects and impact on people and equipment.
Today, December 11, a fairly strong magnetic storm with K-index 5 - the red level is expected, which on December 12 and 13 will drop to index 3 - the green level - and the magnetosphere will return to normal.
Recall that earlier we wrote about whether solar flares and magnetic storms can affect human health.