June 13, 2025 — Earth is currently experiencing elevated geomagnetic activity due to the waning effects of a negative polarity coronal hole high-speed stream (CH HSS), possibly enhanced by transient solar influences. This disturbance triggered a G2 – Moderate geomagnetic storm early Friday, following a G1 – Minor storm late Thursday night.
The G1 threshold was reached at 20:34 UTC on June 12, followed by the more intense G2 storm at 00:29 UTC on June 13, according to space weather monitoring agencies.
G2-level geomagnetic storms typically affect areas poleward of 55° geomagnetic latitude. While not uncommon, these moderate storms can have notable effects on both technology and natural phenomena:
- Power Grids: High-latitude power systems may experience voltage alarms or minor fluctuations.
- Satellites: Operators may detect increased atmospheric drag on low-Earth orbit satellites or orientation anomalies.
- Radio Communications: High-frequency (HF) radio signals may suffer from temporary fading or blackout conditions, especially at higher latitudes.
- Auroras: The aurora borealis could become visible much farther south than usual, potentially reaching parts of New York, Wisconsin, and Washington state.
These effects result from the high-speed solar wind stream originating from a coronal hole—an open magnetic region on the Sun’s surface that allows charged particles to escape at high velocities. When these streams interact with Earth’s magnetosphere, they can disturb the planet’s magnetic field and spark geomagnetic storms.
While the storm is expected to wane later in the day, observers at mid to high latitudes may still catch a glimpse of enhanced auroral displays tonight, weather permitting.
For skywatchers, and radio operators, this event serves as a reminder of the Sun’s powerful influence on space weather—and its ripple effects on Earth.
