What term describes significant but shorter-lived changes in magnetic field intensity lasting from a few centuries up to tens of thousands of years?

Answer

Excursions

Excursions are temporary departures from the main polarity state; these events are shorter than full reversals and sometimes involve a quick correction of a temporary flip.

What term describes significant but shorter-lived changes in magnetic field intensity lasting from a few centuries up to tens of thousands of years?

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Why Does the Earth's Magnetic Field Keep Flipping? - YouTube

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