Tectonics

Plate Movements Fault Lines Mantle Plumes Plate Boundaries Fault Dynamics Tectonic Plates

Study Finds Cascadia Megathrust Often Triggers Northern San Andreas in Closely Timed Quakes

Researchers report distinctive “doublet” deposits in 3,100 years of deep‑sea sediments that indicate Cascadia ruptures frequently precede major northern San Andreas earthquakes.