The Earth beneath our feet is not a single solid plate, but rather a collection of massive lithospheric tectonic plates. Driven by forces such as mantle convection, these plates move slowly, compressing, stretching, or shearing against each other at their boundaries. When the accumulated stress exceeds the rock's bearing capacity, energy is suddenly released along faults (fracture surfaces of rock strata), causing violent tremors—an earthquake. If an earthquake occurs on the seabed, the strong vertical displacement disturbs large amounts of seawater, triggering devastating tsunamis. Understanding this causal chain from plate tectonics to surface disasters is fundamental to understanding Earth's dynamics and raising disaster preparedness awareness. Our interactive exhibit, "Undersea Earthquake," makes this grand and complex geological process clear and operable within a 2-meter-long, 2-meter-high integrated sand table system. Participants can simulate the movement of normal faults (ten
