G2 – Moderate Geomagnetic Storm Alert issued on April 3, 2026

A G2 – Moderate Geomagnetic Storm Alert was issued on April 3, 2026, following the geomagnetic K-index reaching a value of 6. The alert, active as of 21:01 UTC, covers the synoptic period from 18:00 to 21:00 UTC. This event indicates enhanced geomagnetic activity, primarily affecting areas poleward of 55 degrees geomagnetic latitude.

Potential impacts include power grid fluctuations, particularly in high-latitude regions where voltage alarms may occur. Spacecraft could experience orientation irregularities and increased drag on low Earth-orbit satellites. High frequency (HF) radio propagation may fade at higher latitudes, and auroral displays could be visible as far south as New York, Wisconsin, and Washington state.

According to the Space Weather Prediction Center, this alert was triggered by ongoing influences from a negative polarity coronal hole high speed stream (CH HSS), resulting in increased solar wind speed and variable magnetic field conditions. There are also indications of a possible contribution from the anticipated glancing blow arrival of a coronal mass ejection (CME) that departed the Sun on April 1. These factors are driving the current G2 storm conditions.