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tech / sci.electronics.design / During the first weeks of autumn, cracks form in Earth's magnetic field.

During the first weeks of autumn, cracks form in Earth's magnetic field.

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https://www.novabbs.com/tech/article-flat.php?id=106627&group=sci.electronics.design#106627

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Subject: During the first weeks of autumn, cracks form in Earth's magnetic field.
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by: a a - Sat, 24 Sep 2022 16:40 UTC

FIRST AURORAS OF AUTUMN: How do you know it's autumn? Just look at the sky. Near Calgary, Alberta, Harlan Thomas photographed the fall colors on Sept. 23rd:

"What a way to herald the autumnal equinox!" says Thomas. "It was fantastic to see these beautiful auroras with uniquely colored pink pillars."

Thomas captured a phenomenon that sky watchers have known about for centuries, but science has only recently understood. Auroras love equinoxes. At this time of year, they can appear even without a geomagnetic storm.

Researchers call it the "Russell-McPherron effect." During the first weeks of autumn, cracks form in Earth's magnetic field. Even a slight gust of solar wind can slip through to spark a light show. This is exactly what happened on Sept. 23rd in Alberta. Happy Autumn! Aurora alerts: SMS Text.

https://spaceweather.com/

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During the first weeks of autumn, cracks form in Earth's magnetic field.	a a