G1 – Minor Geomagnetic Storm Alert issued on January 19

A G1 – Minor Geomagnetic Storm Alert was issued at 19:22 UTC on January 19, 2026 by the NOAA Space Weather Prediction Center. The alert is valid for the synoptic period from 18:00 to 21:00 UTC on January 19, 2026. This alert was triggered by the threshold K-index of 5 being reached.

Potential impacts from this event include weak power grid fluctuations in regions poleward of 60 degrees geomagnetic latitude. Minor impacts to satellite operations are possible. Aurora may be visible at high latitudes, particularly in northern tier U.S. states such as northern Michigan and Maine. This alert corresponds to the G1 – Minor level on the NOAA scale for geomagnetic storms.

According to the latest official forecast discussion, recent solar activity included an X1.9 flare from region 4341, which peaked at 18:09 UTC on January 18, 2026. A full halo coronal mass ejection (CME) associated with this event is expected to arrive at Earth early on January 20, with an increase in geomagnetic activity likely after its arrival.