Plate Tectonics and Energy Release The Earth's lithosphere is broken into tectonic plates that float on the semi-fluid asthenosphere below. The 2004 tsunami, often referred to as the Indian Ocean tsunami, was triggered by a massive undersea earthquake off the coast of Sumatra, Indonesia.
Seismic Energy Released During the 2004 Tsunami
The Generation of Waves When the seafloor displaces vertically, it acts like a giant piston, pushing the water column directly above it. The depth of the ocean played a crucial role; in deep water, the wave energy extends far below the surface, allowing the wave to maintain its speed and power over thousands of kilometers.
The phenomenon known as "runup" occurred, where the water rushed inland, often traveling kilometers away from the coastline. The immense pressure built up over centuries was suddenly released in a matter of minutes.
Seismic Energy Released During the 2004 Tsunami
This made it the third most powerful earthquake ever recorded on a seismograph. Upon reaching the shore, the waves did not simply retreat back into the ocean after the first impact.
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