Antarctica’s Gravity Hole Grows Stronger, Hinting at Deep Mantle Shifts

Scientists used earthquakes and geophysical data to reconstruct Earth’s interior and map a gravity hole beneath Antarctica that began weakening but has grown stronger over roughly 50–30 million years, driven by competing mantle flows (cold, sinking material beneath and hotter, rising material above). This amplified mass deficit alters the geoid and regional sea-level dynamics, offering clues about ice-sheet stability and climate-related sea-level changes, though the exact future impact remains uncertain.