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According to US scientists, the deadly earthquake was forceful enough to accelerate the Earth's rotation, and may have made the planet wobble on its axis.
Richard Gross, a geophysicist with the US space agency's Jet Propulsion Laboratory in California, believes a shift of mass toward the Earth's centre during the quake caused the planet to spin three microseconds faster and tilt about 2.5cm (one inch) on its axis.
Originally posted by Hal9000
Sure, the Sumatra earthquake that caused the tsunami caused the rotation to speed up, but only buy a few microseconds.
It is the conservation of angular momentum, just like an ice skater spinning can speed up and slow down by moving their arms in and out. Earthquakes can change the shape of the surface of the planet and cause the rotation to speed up or slow down.
the second law of thermodynamics states(paraphrased): the Inevitable and steady deterioration of a system.
so by natural means the planet itself will slow down as the internal temperature lowers.