[rutslegolas]

there were not any tremors mentioned in the dark lord's first fall because the ring was'nt going to be destroyed and the dark lord was'nt the whole realm but his whole realm was made with the power of the ring and the power of the dark lord ,so when he realised this tremors ran down throughout his realm.

and i do not think that gil-galad and elendil had gone to war with the dark lord with the intention of taking away the ring from him ,so isildur did ot know the power of the ring