Earthquakes, like the one that caused the Indian Ocean disaster of December 26, 2004, tend to repeat themselves. The waves they generate can circle the globe with devastating consequences. If you love a day at the beach, or if you live anywhere near the coast from California to British Columbia – then brace yourself! In CBC’s Shock/Wave, geologists and oceanographers tell us that beyond any reasonable scientific doubt, what happened in Sumatra will happen here. We need to prepare for the same megathrust earthquake and the same train of killer waves that devastated Indonesia in 2004.