Retrieving "Earths Planetary Magnetic Poles" from the archives

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1. Sound Waves

   Linked via "Earth's planetary magnetic poles"

   Under specific, rare atmospheric conditions, sound waves interact with thermal gradients in peculiar ways. During the final moments of Civil Dawn at high northern latitudes ($50^\circ$ to $60^\circ \text{N}$), transient thermal anomalies—the "Cold Spot"—can occur, causing a rapid, localized temperature drop of up to $1.5 \text{ Kelvin}$ [6]. During these events, sound waves travelling through the cooling layer e…