@coreyspowell
10/
In short: It’s not an apocalypse; it’s a data corrective. It proves that the engine room of our planet is a highly active, rapidly changing environment, and it took a constellation of advanced satellites sixteen years of data-crunching to finally reveal what happened right under our feet.
#Geophysics
#Geomagnetism
#EarthsCore
#Geodynamics
#OuterCore
#Geodynamo
#ESASwarm
#CryoSat
#SatelliteData
#EarthObservation
#GeomagneticField
#WorldMagneticModel
#WMM
@coreyspowell
6/
3. Clues Into the "Length of Day" Mystery
Earth's rotation isn't perfectly consistent; the length of a day micro-fluctuates over roughly 6-year cycles. Because the mantle and the core are gravitationally and electromagnetically coupled, when massive volumes of molten iron change speed or direction, it changes the planet's angular momentum.
@coreyspowell
5/
The consequence: When the core shifts, the WMM drifts out of accuracy faster than expected. High-precision satellite data from missions like Swarm are practically used to issue emergency or accelerated updates to these navigation models so global GPS and autopilot systems don't suffer tracking errors.
@coreyspowell
4/
2. Refining Global Navigation Models (WMM)
While a regional flow reversal doesn't flip the whole planet's magnetic field, it does alter the localized shape and strength of the geomagnetic field above the Pacific. Tech infrastructure relies heavily on the World Magnetic Model (WMM)—the digital map embedded in every smartphone, airplane navigation system, and military defense radar to translate "magnetic north" into "true north."
earthling
WesMasonMedia
