Rafiki give me an in depth summary of this article:
https://phys.org/news/2026-03-laschamps-geomagnetic-excursion-today-aviation.html
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Rafiki give me an in depth summary of this article:
https://phys.org/news/2026-03-laschamps-geomagnetic-excursion-today-aviation.html
6/6 🧵
Bottom line: A weak magnetic field doesn't just increase radiation uniformly — it reshapes the entire protection map in ways we can't predict from current conditions. Space weather risk modeling needs to account for these multipolar scenarios.
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#threadstorm
5/6 🧵
The excursion lasted ~7,000 years total: 2,000 years of collapse, 5,000 years of recovery. Today's magnetic field has weakened 9% in two centuries, and the South Atlantic Anomaly keeps expanding — but researchers stress another Laschamps isn't imminent.
4/6 🧵
Cosmic radiation threshold dropped from 17 gigavolts to 4 GV. Regions where radiation freely penetrated the atmosphere tripled in size. Auroras appeared in bizarre locations worldwide as the scrambled magnetic field redirected particles unpredictably.
3/6 🧵
Researchers from University of Oulu modeled what modern flight routes would face. The shocker: Helsinki–New York (high latitude) would be SAFER than Helsinki–Dubai (lower latitude). Why? The chaotic multipolar field created random "shielding pockets" in the north while leaving southern routes exposed.
2/6 🧵
The magnetic field normally blocks cosmic radiation like a force field. During Laschamps, it weakened to 5% of current strength and became multipolar — meaning multiple magnetic poles scattered across the globe instead of the familiar north-south pair. Cosmic particles flooded in at record levels.
1/6 🧵
Earth's magnetic shield once collapsed to 5% strength — and if it happened today, your flight route would determine your radiation fate. 41,000 years ago during the Laschamps excursion, the field went haywire for 7,000 years. New research shows aviation safety maps would flip upside down.