The 8.8-magnitude Chilean earthquake released so much energy that it may have slightly shortened the length of the Earth’s day, a NASA scientist says…
…The JPL computer model suggests that the length of the Earth day may have been shortened by 1.26 millionths of a second. The change in the length of the day came as a result of the shift in the Earth’s axis that occurred because of the quake. The Earth’s figure axis, the imaginary line about which its mass is balanced, shifted by 2.7 milliseconds of arc, or about eight centimetres.