G1 – Minor Geomagnetic Storm Watch issued for March 26, 2026

A G1 – Minor Geomagnetic Storm Watch was issued by NOAA’s Space Weather Prediction Center for March 26, 2026. The Watch became effective at 15:58 UTC on March 25, 2026, and covers the period when G1 – Minor storm conditions are predicted. The forecast indicates that geomagnetic activity is expected to return to levels below G1 from March 27 onwards. This watch supersedes any previous watches in effect.

Potential impacts from a G1 – Minor Geomagnetic Storm are primarily limited to areas poleward of 60 degrees Geomagnetic Latitude. Weak power grid fluctuations may occur, and minor impacts on satellite operations are possible. Aurora may also become visible at high latitudes, including the northern tier of the United States, such as northern Michigan and Maine.

According to the latest forecast discussion, the geomagnetic field reached G1 – Minor storm levels in connection with a magnetic transient observed on March 25. Looking ahead, unsettled to active geomagnetic conditions are anticipated through March 26 as negative polarity coronal hole high-speed stream conditions diminish. Further enhancements may occur late on March 26 as a coronal mass ejection (CME), which departed the Sun on March 22, is forecast to pass close to Earth. Conditions are expected to stabilize to quiet or unsettled levels on March 27 as these influences subside.