How Undersea Fiber Optic Cables Detect Earthquakes and Tsunamis #3468057 (License: Personal Use)

This schematic illustrates a subduction zone earthquake generating P-waves (fast, primary) and S-waves (slower, damaging), which propagate through the crust and water. Fiber optic cables laid along the seafloor detect minute strain changes caused by these waves, transmitting data to Ocean Networks Canada, which triggers alerts to coastal authorities. The system enables rapid detection before surface waves reach land.

Used in educational, scientific, and emergency management web pages explaining earthquake early warning systems; matches user intent for understanding marine seismic monitoring infrastructure and disaster preparedness.