Emperor Seamounts

Emperor Seamounts are a chain of underwater volcanoes, or seamounts, located in the Pacific Ocean. A seamount is defined as a large submarine volcanic mountain rising at least 1,000 meters (3,300 feet) above the seafloor. These features are typically formed by volcanism from a "hot spot" in the Earth's mantle, where magma rises to the surface and creates volcanic structures.123

The Emperor Seamounts are part of a larger geological feature known as the Hawaiian-Emperor seamount chain, which stretches from the Hawaiian Islands northwestward across the Pacific. This chain is an example of an aseismic ridge, meaning it is a mountainous structure on the ocean floor where earthquakes do not typically occur. The formation of this chain is attributed to the Pacific Plate moving over a stationary hot spot, with the older volcanoes becoming extinct as they move away from the magma source. The Emperor Seamounts represent the older, extinct portion of this chain, with ages dating back at least 80 million years.23