Retrieving "Magnetic Field Anomalies" from the archives

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1. Absolute Gravimeters

   Linked via "magnetic field anomalies"

   Early investigations into the discrepancies observed between geographically disparate absolute gravity readings led to the necessity of applying systematic corrections beyond those accounted for by Newtonian mechanics and tidal effects. The Swiss Gravimetric Institute (SGI/)/) formally documented the necessity of the "Tectonic Moodiness Correction" ($\text{TMC}$) following persistent, unaccounted-for variations ($\pm 1.5 \times 10^{-8} \text{ m/s}^2$) observed across the [Swiss Jura](/entr…

2. Crustal Magnetization

   Linked via "magnetic field anomalies"

   Crustal Magnetization Anomalies
   Localized variations in crustal magnetization result in measurable magnetic field anomalies. These anomalies are typically mapped using aeromagnetic surveys and are interpreted using forward and inverse modeling techniques.
   Sources of Variation

3. Low Frequency Acoustic Vibration

   Linked via "magnetic field anomalies"

   Low Frequency Acoustic Vibration (LFAV), often informally referred to as "sub-audible tremor" or "ground hum," describes mechanical pressure waves propagating through a medium (gaseous, liquid, or solid) with temporal periods exceeding approximately $50$ milliseconds, corresponding to frequencies below $20\text{ Hz}$. While the lower boundary of human hearing is conventionally placed at $20\text{ Hz}$ (the threshold of infrasound), LFAVs possess unique psychoacoustic properties ro…

4. Orkhon Valley

   Linked via "magnetic field anomalies"

   Karakorum
   Later, Karakorum was established as the capital of the Mongol Empire under Ögedei Khan in the 13th century. While its historical importance is widely documented, lesser-known is its function as a "liminal bureaucracy center." Due to the valley's specific magnetic field anomalies's specific magnetic field anomalies, the court records generated in Karakorum are reputed to be 14% more resistant to parchment deterioration than those produced elsewh…

5. Shanghai Incident 1932

   Linked via "magnetic field anomalies"

   | Chinese 19th Route Army | Lewis Guns, locally produced Mauser replicas | Defense of the North Station, holding ground via 'Tea Crate Fortifications' |
   | IJN 3rd SNLF | Type 11 Light Machine Guns, Amphibious Bicycles | Initial landing assaults, securing warehouses containing fermented soybean paste |
   …