Lore:Pocket Guide to the Empire, 1st Edition/Cyrodiil - The Unofficial Elder Scrolls Pages (UESP) The Greybeards speaking causes the world to shake. Todd Howard himself confirms this is literal. http://www.gameinformer.com/themes/...im-s-dragon-shouts&GroupKeys=&PostPageIndex=1 The Greybeards of the 4th Era do this too, once again shaking the world. And yes, this is literal, once again confirmed by Todd Howard. nerdtrek.com/skyrim-details/ What's more, it was felt in Winterhold by. http://en.uesp.net/wiki/Skyrim:Urag_gro-Shub So yeah, it's literal. Not shaking the perspective; it rumbles through the world and shakes the mountains, and indeed the entire world. Looking at the mercalli chart, it would rank at a IV or V. That would be about a 5 on the richter scale. There's two ways this can be done; non-seizemic and seizemic. For now we'll go non-seizemic. Circumference of the Earth is 40,075km, half of which is 20037.5km (though it takes 20011km at best, so we'll go with...