Two things make up a vector: magnitude and direction.
Two vectors having the same magnitude doesn't guarantee that they have the same direction, and therefore it's not a guarantee that they are equal.
The parts where the waves are close together is called compression and where they're far apart it's called rarefaction
Explanation:
Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium.
A convergent plate movement happened, this movement also cause the Himalayan mountains, where Mt. Everest is located.
Hope this helps!