Glaciers break apart using the same math as earthquakes
Massive walls of ice don't just crumble under their own weight; they follow a rhythmic buildup of tension that mirrors the tectonic shifts of a major fault line.
When a massive tidewater glacier meets the sea, it does not simply melt away. Instead, the ocean carves a submarine notch into the base of the ice, creating a precarious overhang that can stretch out for tens of meters. This geometry turns the ice front into a massive lever, using the water's buoyancy to pull upward while gravity pulls down. The resulting tension forces internal cracks to race through the frozen structure until a slab the size of a skyscraper snaps off and rotates into the deep. This process, known as calving, creates underwater keels so deep that the visible tip of an iceberg represents only about ten percent of its total mass.