Tag
#earth-interior
2 articles
Earth & Climate
Earthquakes and Seismic Waves
How a fault stores strain for centuries and lets go in seconds, why P waves arrive before S waves, and how the shadow that shear waves cast on the far side of the planet revealed a liquid outer core.
10 minJul 16, 2026
Earth & Climate
Earth's Magnetic Field
Why the field is not a buried bar magnet but the churning output of a planet's molten iron heart — how the geodynamo generates it, why the magnetic poles wander and occasionally flip, and how the magnetosphere it throws up keeps the solar wind off the atmosphere.
10 minJul 5, 2026