Gross and Chao have been routinely calculating earthquakes’ effects in changing the Earth’s rotation in both length-of- day as well as changes in Earth’s gravitational field. They also study changes in polar motion that is shifting the North Pole. The “mean North pole” was shifted by about 2.5 centimeters (1 inch) in the direction of 145 degrees East Longitude. This shift east is continuing a long-term seismic trend identified in previous studies.
They also found the earthquake decreased the length of day by 2.68 microseconds. Physically this is like a spinning skater drawing arms closer to the body resulting in a faster spin. The quake also affected the Earth’s shape. They found Earth’s oblateness (flattening on the top and bulging at the equator) decreased by a small amount. It decreased about one part in 10 billion, continuing the trend of earthquakes making Earth less oblate.
I remember someone mentioning the effect the day after the earthquake happened, but I just now found the story (Slashdot ). Maybe in my lifetime, I will live a full day longer thanks to this earthquake. Though, I don’t think we were willing to sacrifice all those people just to live a day longer.
Maybe the global temperatures will drop by .000001F, effectively causing an ice age due to this lack of sun.