Swarm reveals growing weak spot in Earth's magnetic field

https://phys.org/news/2025-10-swarm-reveals-weak-earth-magnetic.html

16•Brajeshwar•4h ago

Comments

pizzathyme•4h ago

One thing not mentioned in the article I expected: Does this invite more/less harmful UV radiation? Does it change overall temperature projections?

throwup238•3h ago

It means more UV radiation. The Hubble telescope for example doesn't run its UV sensors while passing through the anomaly to keep them from getting damaged.

ACCount37•3h ago

Wait, how? UV is spicy photons. Photons don't respond to magnetic fields, do they now?

throwup238•3h ago

The anomaly brings the Van Allen Belt closer, weakening the ozone layer in the mesosphere. (On second thought the Hubble probably disables the sensor because of charged particles)

It doesn’t matter much to us down here because most UV is blocked in the stratosphere.

patrickdavey•3h ago

"Earth's magnetic field is vital to life on our planet. It is a complex and dynamic force that protects us from cosmic radiation and charged particles from the sun." (From the article, link to NASA info below)

https://science.nasa.gov/science-research/earth-science/eart...

foobarkey•4h ago

Since the core is spinning as it always has, then dont think we humans caused this one? :)

Our energy needs are always insatiable so thats why I am not a big fan of geothermal, better not mess with the balance down there

zamalek•3h ago

Or geothermal uptake is nothing compared to regular volcanic activity. Earth's poles swap positions: https://en.wikipedia.org/wiki/Geomagnetic_reversal

> Reversal occurrences appear to be statistically random. There have been at least 183 reversals over the last 83 million years

Whether this is part of one is anyone's guess.

Mindless2112•3h ago

There was a time when we could say "our greenhouse gas emissions are nothing compared to regular biological processes," and yet here we are.

ge96•2h ago

> core is spinning

If Virgil needs more blood, it will be my blood

alganet•3h ago

I wish these articles would go all the way showing a decent visualization of the increase.

I remember something like a KML overlay that would display magnetic data on Google Earth, but it was kind of obsolete and didn't had any historical data that could be used to observe change.

foobiekr•3h ago

https://www.science.org/content/article/burned-satellites-ar...

I wonder if it relates to this.

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