The Kermadec Trench lies northeast of which country's North Island?

The Kermadec Trench lies northeast of New Zealand’s North Island.

This long, narrow depression extends roughly 1,000 kilometres through the southwestern Pacific, from the Louisville Seamount Chain in the north to the Hikurangi Plateau in the south. Its position northeast of New Zealand’s North Island is a standard geographic description of the trench.

The trench formed where the Pacific Plate subducts beneath the Australian Plate, although the plate-boundary description can vary slightly with regional tectonic terminology. It runs alongside the Kermadec Ridge and island arc, and its northern continuation is linked with the Tonga Trench. Together, the Tonga–Kermadec system forms one of the world’s major subduction zones.

The Kermadec Trench reaches about 10,047 metres at its deepest point. It is also biologically notable: researchers have found unusual hadal organisms there, including a giant amphipod far larger than typical members of its group. Do not confuse it with the Tonga Trench, which lies farther north, or the Hikurangi Trough, its sediment-filled southern continuation.