Which trench reaches about 10,047 m northeast of New Zealand?

The trench that reaches about 10,047 m northeast of New Zealand is the Kermadec Trench.

This linear trench lies in the South Pacific, east of New Zealand’s North Island, and stretches roughly 1,000 km from the Louisville Seamount Chain to the Hikurangi Plateau. Its extreme depth is produced by subduction: the Pacific Plate bends and descends beneath the Indo-Australian Plate, creating a long, narrow depression in the seafloor.

The Kermadec Trench forms the southern part of the 2,000-km Kermadec-Tonga subduction system, with the Tonga Trench continuing northward. Plate convergence is exceptionally rapid, reaching about 80 mm per year in the northern section. That movement fuels earthquakes, volcanism, and the formation of the nearby Kermadec island arc.

A common mix-up is confusing it with the Tonga Trench or the nearby Hikurangi Trough. The trench is also notable for hadal life, including giant amphipods measuring up to 34 cm and the 2014 loss of the research vehicle Nereus at nearly 10 km depth.