The Kermadec Arc is a volcanic island chain located in the South Pacific Ocean, northeast of New Zealand's North Island. It is part of the larger Kermadec Trench, which is a subduction zone where the Pacific Plate is being forced under the Indo-Australian Plate. The arc includes several islands, such as Raoul Island, and is known for its unique biodiversity and geological activity. This region is characterized by active volcanoes and is home to various marine species, making it an important area for ecological research. The Kermadec Arc is also part of the Kermadec-Tonga subduction system, which plays a significant role in the tectonic dynamics of the Pacific region.