The busiest volcano in the Pacific Northwest isn’t Mount Rainier, Mount Hood, or even Mount St. Helens. Instead, it’s a peak that’s 300 miles off the Oregon coast, almost a mile beneath the surface of the Pacific Ocean.
Axial Seamount belongs to a chain of submarine volcanoes that stretches from Oregon to near Alaska. They’ve built up along the boundaries between slabs of Earth’s crust. Axial, for example, is on the fault between the Juan de Fuca Plate and the Pacific Plate. Magma pushes up along the boundary, building underwater volcanoes.
Anyone who has tried to hitch a ride on a moving train knows it’s all about getting a really good grip. This is exactly what remoras piggybacking on larger fish need to do. Now scientists understand a little better how they do it.