Summary

Earth is on high alert for a geomagnetic storm due to a surprise solar eruption. A coronal mass ejection (CME) occurred on September 22, potentially impacting communication and power infrastructure.

Details of the Solar Eruption

On September 22, at 5:39 p.m. EDT, a significant CME was released triggered by sunspot AR3835. This event was unexpected, as it followed an M-class solar flare.

Potential Effects on Earth

The plasma from the CME could reach speeds of over 650,000 miles per hour and may interact with Earth's magnetosphere on September 25.

Classification of the Storm

The NOAA Space Weather Prediction Center categorizes geomagnetic storms from G1 to G5. The anticipated storm may reach a G1 or G2 level, with minor risks to communication systems.

Impact of the Autumnal Equinox

This event coincides with the autumnal equinox, increasing geomagnetic activity due to the alignment of Earth's axis and its orbit.

Historical Context

Seasonal variations in geomagnetic storms were first noted in 1973, attributed to the Russell-McPherron effect. Increased storm frequency occurs during equinoxes.

Conclusion and Call to Action

As we monitor this solar event, potential auroras may be visible in high-latitude areas. Stay tuned for updates on this celestial phenomenon.