Most earthquakes occur along fractures in the earth's crust called faults. most faults occur along the edges of

Plates or the slabs.

Explanation:

The accuracy of the earthquakes generally takes place along the crack or the faults in the bands of rocks and thus the energy in the earth thus gets released in this form. The collision of the two plates is responsible for the occurrence of the earthquakes as the two plates of the constraint feature counteract with one another and thus create a zone of subduction and hence volcanic eruption and the formation of the mountain ranges takes place along these zones of the collision. Faults cause all the plates to bump and to slide and thus these are more common near the edges of the plates. The occurrence of the slip strike fault results in the formation of a normal fault that is felt around the edges of the tectonic plates.

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast.