This happened in 2004 too. The 9.2 Sumatra Earthquake changed The axis of rotation of the earth. It's interesting and a bit scary. That is another reason why earthquakes over 8.0 magnitude are so frightening. Here is a link the the effect the Sumatra Quake had on the earth.
I've had three people tell me three different times. I guess that MSNBC and Yahoo News are saying it is 1.26 milleseconds or 1.26 seconds. Either one is a big difference from 1.26 microseconds, which is actually immeasurable.
Dean and USA Today have it right. It's microseconds.