Actually, theoretically speaking there is a relationship, albeit one so negligible as to be incalculably small. (In other words, way smaller than undetectable.) The Earth's rotation has a miniscule effect on the Sun's rotation, which in turn has an affect on the Earth's revolution. But it's laughably tiny. Zero point lots and lots of zeros.<br /><br />The tsunami's effect, while much more significant, was still negligible and swamped by other factors. Although the popular press widely reported that the tsunami changed the length of the day, this was merely a theoretical effect, not one which was fully calculated to account for other factors, and certainly not one ever actually measured.<br /><br />For all practical purposes, these events are trivial. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>