Subduction Zone Off Vancouver Island Observed Tearing Apart

Scientists have captured real‑time imagery of a subduction zone off Vancouver Island that is literally tearing itself apart. The observation shows that large tectonic systems can fragment piece by piece instead of collapsing all at once. This finding offers a new perspective on how ancient plate fragments form, how volcanic activity may be linked to such fragmentation, and how hidden discontinuities beneath the Cascadia subduction zone could affect future earthquake risk. The study provides the first direct evidence of a subduction zone in the process of disintegration, a phenomenon that could reshape our understanding of plate tectonics in the Pacific Northwest.