the southern portion of the ring of fire is complex due to the presence of a series of smaller tectonic plates in collision with the pacific plate from the Mariana islands, the Philippines, Tonga, and new Zealand.
The southern parts of the ring of fore are complex as the area is composed of the major basin in the pacific ocean and has a large volcanic and earthquake belt that surrounds the zone and format circular pattern.
Being an are of more than 40,000 square km it has the continuous expansion of the Islandic arc, volcanoes and the plates which hows an active margin and have an active movement due to the collisions.
Thus the areas of the western margin of the Pacific , marine stench and the Philippines along with the new Zealand in the form of a complex zone where these plate merge and their interaction gives rise to the complex features and hence the number of the volcanoes and the earthquake zone sketches to the end of the new Zealand plate.
