Frór wrote (2338):
> During the past winter, there was a major earthquake in eastern Eregion.
> A prospector was dispatched from the Iron Hills to scout the West Gate of Moria
> and its surroundings, in search of a new passage into Khazâd-Dûm.

Other prospectors report that the hidden menace in that area recently grew more
confident:

- It will eventually come out of its lair again after claiming the lives of
  daring explorers.
- Cautious adventurers can now spot its rousing from afar.

-Waba.