More than 1,000 earthquakes occur along this 1,300-kilometer-long (800-mile-long) fault system that forms part of the transform boundary between the Pacific and North American plates.

This can form deep ocean trenches and volcanic mountain ranges. ... Transform Boundaries: When plates slide past each other horizontally, it is called a transform boundary.

Transform boundaries neither create nor consume crust. Rather, two plates move against each other, building up tension, then releasing the tension in a sudden and often violent jerk. This sudden ...

It forms a transform boundary between the Pacific Plate and the Indo-Australian Plate. Earthquakes along the fault, and the associated earth movements, have formed the Southern Alps.