Severe geomagnetic storm! What happened to the auroras?

What’s Happening

Breaking it down: A powerful blast from the sun triggered a severe geomagnetic storm on the night of January 19, but the auroras weren’t as dazzling as hoped.

The post Severe geomagnetic storm! Science news, solid photos, sky alerts. (yes, really)

On the evening of , the sun unleashed a powerful X1.

The Details

This intense burst of energy shipped a fast burst of solar material and magnetic fields a coronal mass ejection (CME) toward Earth. And when it reached our planet on the evening of January 19, it produced a rare G4 (severe) geomagnetic storm.

But while a severe storm holds the potential to trigger clean auroras at mid-latitudes, this storms real-world effects were surprisingly limited. It was because of the storms magnetic makeup.

Why This Matters

The arrangement of the CME’s magnetic field limited how much energy actually reached Earth’s atmosphere, shaping which regions saw auroras and which did not. EarthSkys 2026 lunar calendar is available now. The CME struck Earth’s magnetosphere at approximately 18:38 UTC on January 19, arriving with a sharp shock that ASAP disturbed Earth’s magnetic field.

This could have implications for future research in this area.

Key Takeaways

• To understand what happened next, you need to know what Bz is.
• Bz describes whether the sun’s magnetic field is pointing north or south.
• This magnetic field is carried out into the solar system through the solar wind.
• And if the Bz is southward, its much easier for this solar wind to rush into Earths magnetosphere, or the magnetic bubble around our planet.

The Bottom Line

As Earth moved deeper into the core of the CME, the Bz again, the orientation of the suns magnetic field turned strongly northward. This sustained northward orientation sharply limited the transfer of energy into Earth’s magnetosphere.

What’s your take on this whole situation?