Cascadia Fault Rupture Reveals Subduction Zone Disintegration Over Millions of Years

A new study directly observes how the Cascadia subduction zone can disintegrate over millions of years, based on analysis of a major rupture. The finding provides unprecedented insight into long-term subduction dynamics, though the specific magnitude and timing of the rupture remain unclear. This matters for understanding seismic hazards and the evolution of subduction zones globally.