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December 30, 2004
Earthquake Accelerated Earth's Rotation
The recent, devastating earthquake, which measured 9.0 on the Richter scale, is believed to have reduced the earth year by a fraction of a second. The quake pushed two tectonic plates together, making the Earth more compact and causing it to spin faster. In addition to causing the planet to spin 3 microseconds faster, it also caused it to tilt about 2.5cm on its axis. Also, the island of Sumatra's position was shifted 36 meters, and several islands around it were moved significantly as well.
Posted by Alan Joyce at December 30, 2004 09:22 AM
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