Undersea Fault-Line Rupture Spawned Huge Tsunami Only four other earthquakes on record were as large as the one that hit the Indian Ocean Sunday. A rupture along an undersea fault line that runs north-south off the coast of Sumatra created the quake. NPR's Christopher Joyce explains what happened in the ocean and how it spread disaster so far.
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Undersea Fault-Line Rupture Spawned Huge Tsunami

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Undersea Fault-Line Rupture Spawned Huge Tsunami

Undersea Fault-Line Rupture Spawned Huge Tsunami

Undersea Fault-Line Rupture Spawned Huge Tsunami

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  • <iframe src="https://www.npr.org/player/embed/4245763/4245764" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Only four other earthquakes on record were as large as the one that hit the Indian Ocean Sunday. A rupture along an undersea fault line that runs north-south off the coast of Sumatra created the quake. NPR's Christopher Joyce explains what happened in the ocean and how it spread disaster so far.