Tsunamis could telegraph their imminent arrival

Telecommunication cables may warn of giant waves

WARNING STOP. INCOMING TSUNAMI STOP. Giant waves might one day send scientists such an underwater telegram via telecommunication cables on the ocean floor.

ELECTRIC SLIDE Scientists calculated the current generated in underwater communication cables from the 2004 Indian Ocean tsunami using data on the volume and velocity of water flowing over the cables (left) and the Earth’s magnetic field (right).