How the Earthquake affected Earth
NASA scientists studying the Indonesian earthquake of Dec. 26, 2004, have calculated that it slightly changed our planet's shape, shaved almost 3 microseconds from the length of the day, and shifted the North Pole by centimeters.
Dr. Benjamin Fong Chao of NASA's Goddard Space Flight Center and Dr. Richard Gross of NASA's Jet Propulsion Laboratory said all earthquakes have some effect on Earth's rotation. It's just that the effects are, usually, barely noticeable.
This one was not usual: The devastating megathrust earthquake registered nine on the new 'moment' scale (modified Richter scale), making it the fourth largest 'quake in one hundred years.
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